{"markup":"\u003C!DOCTYPE html PUBLIC \u0022-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\u0022 \u0022http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\u0022\u003E\n\u003C?xml version=\u00221.0\u0022 encoding=\u0022UTF-8\u0022 ?\u003E\u003Chtml version=\u0022HTML+RDFa+MathML 1.1\u0022 content=\u0022http:\/\/purl.org\/rss\/1.0\/modules\/content\/\u0022 dc=\u0022http:\/\/purl.org\/dc\/terms\/\u0022 foaf=\u0022http:\/\/xmlns.com\/foaf\/0.1\/\u0022 og=\u0022http:\/\/ogp.me\/ns#\u0022 rdfs=\u0022http:\/\/www.w3.org\/2000\/01\/rdf-schema#\u0022 sioc=\u0022http:\/\/rdfs.org\/sioc\/ns#\u0022 sioct=\u0022http:\/\/rdfs.org\/sioc\/types#\u0022 skos=\u0022http:\/\/www.w3.org\/2004\/02\/skos\/core#\u0022 xsd=\u0022http:\/\/www.w3.org\/2001\/XMLSchema#\u0022 mml=\u0022http:\/\/www.w3.org\/1998\/Math\/MathML\u0022\u003E\u003Chead\u003E\u003Cscript type=\u0022text\/javascript\u0022 src=\u0022http:\/\/www.highwirestage.com\/sites\/default\/files\/js\/js_M8BsRY25PLDHBensqRcUs1nEubvHeoGn5HSxBrIWeZs.js\u0022\u003E\u003C\/script\u003E\u003Cscript type=\u0022text\/javascript\u0022\u003E\n\u003C!--\/\/--\u003E\u003C![CDATA[\/\/\u003E\u003C!--\njQuery.extend(Drupal.settings, {\u0022basePath\u0022:\u0022\\\/\u0022,\u0022pathPrefix\u0022:\u0022\u0022,\u0022panels_ajax_pane\u0022:{\u0022new-d5e9ecaa-460b-40c1-87fb-0dbcbc3a749d\u0022:\u0022{\\u0022encrypted\\u0022:\\u0022{\\\\\\u0022encrypted\\\\\\u0022:\\\\\\u0022sRA592RXenHGrUQrHW9RTmd3CtX3yDzTjCLSSQwiKFPh2ZyziwmAGr6aif9hF+brsmZXHS5uLNuj3W2R9uB4x06mxdoKO2quCQlEixvpVb4PEFVKeZdoqXeswxqRY5nJz63lCvq5BnXzfix0cUtcefG3VadaMzJeyWQpIFKaJsJ6QUHL7i3M5kZCzRD3ErLndlDMwMPXtfZjQnMw+Itwy7d6yT8pqWKHSr1XynrvzDFyTI4Qeb7y2aQN9QFBYFq99ZctoV8pwq6XetoBDqfIzulOJwGpIrbnGQD0tafx6lI2DI4fGRUXl3u+7exUPMO27cOvfhX9Z9r3NjsW96dKtnPp3wZEyvtHyqb3v\\\\\\\\\\\\\\\/mCTHqT9FabM+GI4TcpcNHX3JAKKWwdrED+yktg2DXW64iF02gvlrXzz3yPwu1ZPrWMRqlRoulgNlkbIZpIamF3Cu++\\\\\\\\\\\\\\\/tTe69H1o1uIuUIQ4cW0NRY21XutmI5ZyeG\\\\\\\\\\\\\\\/Do1pUFvjORIHbQ2InalkiXApHhBP8X0GN5CLKlhEU1fgnoa+0EXLF0g169MEIuGkEESymRsgM1bCjcxMTfTzXl2qHVLoxafAAyb1DmhN7f38dPnSrcGQB+EnbvShd2wac1EU8mArdy6T\\\\\\\\\\\\\\\/51Tc7+FUaGyNONUka0bMEWVkka3kZQT7iGWVtqP9X2QyxdJlk03oVowsjlDYHyYo01qqkLjp5fu76M8sATTx1U7AjR7Oj9Ruh+lxHf+jYkcVU9UVzx+FJ8rCpEYA1+uxoT3VsE3uFOVEU7GgdOpKORjcKMmg4C2wGF+OmoJusSJ2peD3xxM9BK5meI4YsF090wkwqGZ4unv0h\\\\\\\\\\\\\\\/m5m6WdyU3B88MUAuTZXsGhF4qau63jPMsC+Fn817N3MJvYUjGNM1XREUiHTjxYWtq4b3BGSDedMGkDnnGf3zGHULNfkf\\\\\\\\\\\\\\\/i4U4ZovSgp4P2ptK6bc1OPnJlWdts4pmK26rrUSqwEP6d8t+nISEtv9X5VsZDMB5crL9RsOjKV6hS5rN8DUgis4vMNU7EvBBPTih864T2tuzQzloxw\\\\\\\\\\\\\\\/7a1RS1xFCQKYRKuXqWFIQ476Yt2p1U2PVPRt3T2v69D6P8LLySG8j+y5fuoI+dlrjkrFg6S\\\\\\\\\\\\\\\/l5Q5lOEcblxXC0esgHnd93dVkT9wpQujT3elXYPDL4jfbhSbU+8WO8gRXYwAkSYJs3VTcbXWmYiUhmkqTfm5An9W6DwBIhWxKshnU8xN1D7TMkjFDIYx\\\\\\\\\\\\\\\/7o7nRbDuE2Z3ufbfCgS7tIx1ODhvb45ZxitEnZWoLGMqpwecEIFkhSLmC4AuuCwjTeKDe3Z85TD4zocwgZIDfxyYSQgR7m7sJIAOW\\\\\\\\\\\\\\\/6RSa65RrwVQEtJMScX+TDn7yerGKmCGusA5bw36HlhFnL+8m6YYTjxNPkb4qlBAtBNHgIf03kpy15hk3s5rONmVd54qMvanpln9zpJsCispSdyRlXoWS0xccgmObKaAy0BNYZWWA3xjtfKltqoSn7dWzlqCacBNqz2iNmwvvsHv\\\\\\\\\\\\\\\/zY8eLocVHW21vJyvLloO7NEI5xSW0E46mnHijLiRZO4UTH7bJ8SPLY3k6jD0XRKEMrjuf5mjrGllX13QdeethPo7CsIGzoeL48Lxkve\\\\\\\\\\\\\\\/iIoDGryxSlSHh6Xv6fHuFCJ85q5n6S21FvezupWQnxg9\\\\\\\\\\\\\\\/2vHW2RxvWdv\\\\\\\\\\\\\\\/IkNAR9gfJcUmtgTaRHGWEkQKfvbfuVxODTeBc1ymA2mCBD7f3jUNEHHJxIBcTPuJJm6tZe0YUjEdSxmYBt\\\\\\\\\\\\\\\/MTh8p1R799DQ4kkI9Gg2nhBOwS08lmCbmfkNFGpUzStgr\\\\\\\\\\\\\\\/0wMVyVQ1lQ43GqUXp2cIsh07a6uioM+6e9GDOPdLsQvqd8ylues8kyqIVIZ2Gl9jAfsS9ICS9JgipyD4fNNq9vDP68p2laxL8jF1QIK3AcbFHFnEOSJBtZ9Xq\\\\\\\\\\\\\\\/bAfqpzvlapUF8Hltc3\\\\\\\\\\\\\\\/OAZV0PNaSETsIzd49T52Py9Y0MwDaHvSyzLnIWSkTJ1\\\\\\\\\\\\\\\/dwOV0tODk94CwKqUV9T723s1r1UdE6xBN7tdgzS9hV8PrqFW2tUdvl\\\\\\\\\\\\\\\/kJqchQ25CIAJh4C55RhiJshuLCD0M0bToSKO1fxZt13QMLaVsIn\\\\\\\\\\\\\\\/Ixx+9I6k4mjeXc6YPa0XcDKmTthdc03Faf900BLxq9tFjGr4zVgebF\\\\\\\\\\\\\\\/7p0ne7f9+UlFdBe7TEtGMvMa5AnOUU0wYaS8e0DP1SYyW1YgjNrCtbka9uAQxoq+KuYy1160PFfvmYTR5t0hKeQfzbU9IpoO0tUH6PkzXaZ3MlMOG2YsHIjH2Mxo+XvEMzQvbaF45FLgwqf6eGa\\\\\\\\\\\\\\\/XmEXxC2T2wS+JCdq\\\\\\\\\\\\\\\/8LFFe27NvMr54yzFbm5DExk6zaAmq1jbLd7ZKuumT30M216ofs6KtlVMaoMjrHwp5B2PQoqUTD\\\\\\\\\\\\\\\/jc195VbvPmlx+ta0ZVB7wuGBVFTGZv7pLe7R\\\\\\\\\\\\\\\/OT9Yt4uP5RbSS5g8f+RyqhmMvaRD6vXJ6AF+Q2vtU5WO+cJKRlk5b5GZE8oRpzVNWfewwrJ5Rd0KtajJp4B9fWcHCE5UleYTY5fVLXQgMeQVH0Ansg2VPO\\\\\\\\\\\\\\\/WxqUEYBe2mYVSA4IU31Mei14K4nm3Z+KFZ6Z+HQy\\\\\\\\\\\\\\\/YyO3\\\\\\\\\\\\\\\/l1vBUoUXdv9FEpbqiHB0CFPHN7pIHeGBYr+zMqn7R1vNc8vQ8jlkhp6DjJQhOtF3bzif0lwoEspHAmjRx20zs0Hu+PJXd0jzbXPabNXTn8\\\\\\\\\\\\\\\/o\\\\\\\\\\\\\\\/3dnVL4ahN5gq17rcS3jHilkQyMIJprMlb0yXzI1DEidyJv4H\\\\\\\\\\\\\\\/o+5Y4fHdvTsIUGsAqlhTayIf7LWjEmRRLheIMjAVryZFULUoHOJY4J8QomBI325g+tWzr7OH7acv4jXsE4p943hbBKwpLd2\\\\\\\\\\\\\\\/WF2kx+RHNjsUB3KsZC3LtDxc9HbN2Mjzb2GG7UiRF0w4NeCe0iT5PfDgrzXgbHjydvg==\\\\\\u0022,\\\\\\u0022iv\\\\\\u0022:\\\\\\u0022zw3wqi5eTHOtt1ChkkRdOQ==\\\\\\u0022,\\\\\\u0022salt\\\\\\u0022:\\\\\\u00223fcf69c0544933648ca27e63b3137e55\\\\\\u0022}\\u0022,\\u0022hmac\\u0022:\\u00228a2794fe60e441968dc24c0adae3e534f1335f193d5ed2d595042d9aaf22fe93\\u0022}\u0022},\u0022highwire\u0022:{\u0022ac\u0022:{\u0022\\\/jitc\\\/8\\\/1\\\/e000798.atom\u0022:{\u0022access\u0022:{\u0022full\u0022:true},\u0022pisa_id\u0022:\u0022\u0022,\u0022apath\u0022:\u0022\\\/jitc\\\/8\\\/1\\\/e000798.atom\u0022,\u0022jcode\u0022:\u0022jitc\u0022}}},\u0022bmjj\u0022:{\u0022show_corresp\u0022:false},\u0022ajaxPageState\u0022:{\u0022js\u0022:{\u0022sites\\\/all\\\/modules\\\/contrib\\\/panels_ajax_pane\\\/panels_ajax_pane.js\u0022:1,\u0022sites\\\/default\\\/modules\\\/jnl_template_bmjj\\\/plugins\\\/content_types\\\/js\\\/bmjj-contributors.js\u0022:1}}});\n\/\/--\u003E\u003C!]]\u003E\n\u003C\/script\u003E\u003Clink type=\u0022text\/css\u0022 rel=\u0022stylesheet\u0022 href=\u0022\/\/www.highwirestage.com\/sites\/default\/files\/advagg_css\/css__XqNETqO2KISUuux0IjZeixOTFnSk20iJyWcdyjFvJv0__V5XKdmT7SKbPMZ3oiYeZn3IKAzRNs6WzDcLxN472J6o__3qvfz4I9k5oUIeimOjbmdyh6ZgM-xweyVc5gub1_nR4.css\u0022 media=\u0022all\u0022\u003E\u003C\/head\u003E\u003Cbody\u003E\u003Cdiv class=\u0022panels-ajax-tab-panel panels-ajax-tab-panel-jnl-template-bmjj-art-info\u0022\u003E\u003Cdiv class=\u0022panel-display highwire-1col-stacked-layout\u0022\u003E\n\t  \u003Cdiv class=\u0022panel-row-wrapper panel-row-first clearfix\u0022\u003E\n\t\t\n\t\t\u003Cdiv class=\u0022top-wrapper\u0022\u003E\n\t\t\t\u003Cdiv class=\u0022panel-panel panel-region-top\u0022\u003E\n\t\t\t  \u003Cdiv class=\u0022inside\u0022\u003E\u003Cdiv class=\u0022panel-pane pane-highwire-article-crossmark\u0022\u003E\n  \n      \n  \n  \u003Cdiv class=\u0022pane-content\u0022\u003E\n    \u003C!-- Start CrossMark Snippet v2.0 --\u003E\n    \u003Ca data-target=\u0022crossmark\u0022 class=\u0022crossmark-square\u0022\u003E\u003Cimg src=\u0022https:\/\/crossmark-cdn.crossref.org\/widget\/v2.0\/logos\/CROSSMARK_Color_square.svg\u0022 alt=\u0022\u0022\u003E\u003C\/a\u003E\n    \u003Cdiv id=\u0022crossmark-dialog\u0022 style=\u0022display: none;\u0022 title=\u0022\u0022\u003E\n    \u003C!-- the external CrossMark data is loaded inside this iframe --\u003E\n    \u003Ciframe id=\u0022crossmark-dialog-frame\u0022\u003E\u003C\/iframe\u003E\n    \u003C\/div\u003E\n    \u003C!-- End CrossMark Snippet --\u003E  \u003C\/div\u003E\n\n  \n  \u003C\/div\u003E\n\u003Cdiv class=\u0022panel-separator\u0022\u003E\u003C\/div\u003E\u003Cdiv class=\u0022panel-pane pane-bmjj-contributors author-ids col-narrow-12\u0022\u003E\n  \n        \u003Ch3 class=\u0022pane-title\u0022\u003EAuthors\u003C\/h3\u003E\n    \n  \n  \u003Cdiv class=\u0022pane-content\u0022\u003E\n    \u003Cdiv class=\u0022field field-name-field-highwire-a-contributors field-type-text field-label-hidden\u0022\u003E\u003Cdiv class=\u0022field-items\u0022\u003E\u003Cdiv class=\u0022field-item even\u0022\u003E\u003Cdiv class=\u0022highwire-list-wrapper\u0022\u003E\u003Cdiv class=\u0022highwire-list\u0022\u003E\u003Cul class=\u0022highwire-contributors-list multiple-contrib\u0022\u003E\u003Cli class=\u0022first odd\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003ELu\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003EXie\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-1\u0022\u003EMusculoskeletal Tumor Center\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-2\u0022\u003EPeking University People\u0027s Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Ca href=\u0022\/lookup\/external-ref?access_num=Xie%20L\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3ALu%20Xie%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u0022even\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003EJie\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003EXu\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-1\u0022\u003EMusculoskeletal Tumor Center\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-2\u0022\u003EPeking University People\u0027s Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Ca href=\u0022\/lookup\/external-ref?access_num=Xu%20J\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3AJie%20Xu%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u0022odd\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003EXin\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003ESun\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-1\u0022\u003EMusculoskeletal Tumor Center\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-2\u0022\u003EPeking University People\u0027s Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Ca href=\u0022\/lookup\/external-ref?access_num=Sun%20X\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3AXin%20Sun%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u0022even\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003EWei\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003EGuo\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-1\u0022\u003EMusculoskeletal Tumor Center\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-2\u0022\u003EPeking University People\u0027s Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Cspan class=\u0022nlm-contrib-id\u0022 data-contrib-id-type=\u0022orcid\u0022 data-authenticated=\u0022false\u0022 data-href=\u0022http:\/\/orcid.org\/0000-0002-4772-6592\u0022\u003E\u003C\/span\u003E\u003Ca href=\u0022\/lookup\/external-ref?access_num=Guo%20W\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3AWei%20Guo%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u0022odd\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003EJin\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003EGu\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-3\u0022\u003ESurgical Oncology\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-4\u0022\u003EPeking University Shougang Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Ca href=\u0022\/lookup\/external-ref?access_num=Gu%20J\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3AJin%20Gu%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u0022even\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003EKuisheng\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003ELiu\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-1\u0022\u003EMusculoskeletal Tumor Center\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-2\u0022\u003EPeking University People\u0027s Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Ca href=\u0022\/lookup\/external-ref?access_num=Liu%20K\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3AKuisheng%20Liu%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u0022odd\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003EBingxin\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003EZheng\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-1\u0022\u003EMusculoskeletal Tumor Center\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-2\u0022\u003EPeking University People\u0027s Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Ca href=\u0022\/lookup\/external-ref?access_num=Zheng%20B\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3ABingxin%20Zheng%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u0022even\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003ETingting\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003ERen\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-1\u0022\u003EMusculoskeletal Tumor Center\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-2\u0022\u003EPeking University People\u0027s Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Ca href=\u0022\/lookup\/external-ref?access_num=Ren%20T\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3ATingting%20Ren%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u0022odd\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003EYi\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003EHuang\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-1\u0022\u003EMusculoskeletal Tumor Center\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-2\u0022\u003EPeking University People\u0027s Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Ca href=\u0022\/lookup\/external-ref?access_num=Huang%20Y\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3AYi%20Huang%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u0022even\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003EXiaodong\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003ETang\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-1\u0022\u003EMusculoskeletal Tumor Center\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-2\u0022\u003EPeking University People\u0027s Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Ca href=\u0022\/lookup\/external-ref?access_num=Tang%20X\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3AXiaodong%20Tang%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u0022odd\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003ETaiqiang\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003EYan\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-1\u0022\u003EMusculoskeletal Tumor Center\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-2\u0022\u003EPeking University People\u0027s Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Ca href=\u0022\/lookup\/external-ref?access_num=Yan%20T\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3ATaiqiang%20Yan%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u0022even\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003ERongli\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003EYang\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-1\u0022\u003EMusculoskeletal Tumor Center\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-2\u0022\u003EPeking University People\u0027s Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Ca href=\u0022\/lookup\/external-ref?access_num=Yang%20R\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3ARongli%20Yang%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u0022odd\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003EKunkun\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003ESun\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-5\u0022\u003EPathology Department\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-6\u0022\u003EPeking University People\u0027s Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Ca href=\u0022\/lookup\/external-ref?access_num=Sun%20K\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3AKunkun%20Sun%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u0022even\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003EDanhua\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003EShen\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-5\u0022\u003EPathology Department\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-6\u0022\u003EPeking University People\u0027s Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Ca href=\u0022\/lookup\/external-ref?access_num=Shen%20D\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3ADanhua%20Shen%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u0022last odd\u0022\u003E\u003Cspan class=\u0022nlm-given-names\u0022\u003EYuan\u003C\/span\u003E \u003Cspan class=\u0022nlm-surname\u0022\u003ELi\u003C\/span\u003E \u003Cspan class=\u0022nlm-aff\u0022\u003E\n\n\u003Cspan class=\u0022nlm-institution\u0022 data-content-type=\u0022department\u0022 data-hwp-id=\u0022institution-7\u0022\u003ERadiology Department \u0026amp; Nuclear Medicine Department\u003C\/span\u003E, \u003Cspan class=\u0022nlm-institution\u0022 data-hwp-id=\u0022institution-8\u0022\u003EPeking University People\u0027s Hospital\u003C\/span\u003E, \u003Cspan class=\u0022nlm-addr-line\u0022 data-content-type=\u0022city\u0022\u003EBeijing\u003C\/span\u003E, \u003Cspan class=\u0022nlm-country\u0022\u003EChina\u003C\/span\u003E\n\u003C\/span\u003E \u003Ca href=\u0022\/lookup\/external-ref?access_num=Li%20Y\u0026amp;link_type=AUTHORSEARCH\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EPubMed articles\u003C\/a\u003E\u003Ca href=\u0022\/lookup\/google-scholar?author%5B0%5D=%22author%3AYuan%20Li%22\u0026amp;gs_type=author\u0022 target=\u0022_blank\u0022 class=\u0022authour-link\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EGoogle scholar articles\u003C\/a\u003E\u003C\/li\u003E\u003C\/ul\u003E\u003C\/div\u003E\u003C\/div\u003E\u003C\/div\u003E\u003C\/div\u003E\u003C\/div\u003E  \u003C\/div\u003E\n\n  \n  \u003C\/div\u003E\n\u003C\/div\u003E\n\t\t\t\u003C\/div\u003E\n\t\t\u003C\/div\u003E\n\t\n\t\u003C\/div\u003E \u003C!-- \/.panel-row-wrapper --\u003E\t\n\t  \n  \u003Cdiv class=\u0022panel-row-wrapper clearfix\u0022\u003E\n\t\t\n\t\t\u003Cdiv class=\u0022content-wrapper\u0022\u003E\n\t\t\t\u003Cdiv class=\u0022panel-panel panel-region-content\u0022\u003E\n\t\t\t  \u003Cdiv class=\u0022inside\u0022\u003E\u003Cdiv class=\u0022panel-pane pane-highwire-article-citation\u0022\u003E\n  \n        \u003Ch2 class=\u0022pane-title\u0022\u003ECitation\u003C\/h2\u003E\n    \n  \n  \u003Cdiv class=\u0022pane-content\u0022\u003E\n    \u003Cdiv class=\u0022highwire-article-citation highwire-citation-type-highwire-article node13620\u0022 data-node-nid=\u002213620\u0022 id=\u0022node-13620--2477598243\u0022 data-pisa=\u0022jitc;8\/1\/e000798\u0022 data-pisa-master=\u0022jitc;jitc-2020-000798\u0022 data-apath=\u0022\/jitc\/8\/1\/e000798.atom\u0022\u003E\u003Cdiv class=\u0022highwire-cite highwire-cite-highwire-article highwire-citation-v1-cp clearfix bmjj-article-citation\u0022\u003E\n  \n  \n    \t\u003Cdiv class=\u0022highwire-cite-authors\u0022\u003E\u003Cspan class=\u0022highwire-citation-authors\u0022\u003E\u003Cspan class=\u0022highwire-citation-author first\u0022 data-delta=\u00220\u0022\u003E\u003Cspan class=\u0022nlm-surname\u0022\u003EXie\u003C\/span\u003E L\u003C\/span\u003E, \u003Cspan class=\u0022highwire-citation-author\u0022 data-delta=\u00221\u0022\u003E\u003Cspan class=\u0022nlm-surname\u0022\u003EXu\u003C\/span\u003E J\u003C\/span\u003E, \u003Cspan class=\u0022highwire-citation-author\u0022 data-delta=\u00222\u0022\u003E\u003Cspan class=\u0022nlm-surname\u0022\u003ESun\u003C\/span\u003E X\u003C\/span\u003E\u003C\/span\u003E\u003Cspan class=\u0022citation-et\u0022\u003E, et al\u003C\/span\u003E\u003C\/div\u003E\n  \n      \u003Cdiv class=\u0022highwire-cite-title\u0022\u003EApatinib plus camrelizumab (anti-PD1 therapy, SHR-1210) for advanced osteosarcoma (APFAO) progressing after chemotherapy: a single-arm, open-label, phase 2 trial\u003C\/div\u003E  \n      \n    \t\u003Cdiv class=\u0022highwire-cite-metadata bmjj-citation-metadata\u0022\u003E\u003Cspan class=\u0022highwire-cite-metadata-journal highwire-cite-metadata\u0022\u003EJournal for ImmunoTherapy of Cancer \u003C\/span\u003E\u003Cspan class=\u0022highwire-cite-metadata-year highwire-cite-metadata\u0022\u003E2020;\u003C\/span\u003E\u003Cspan class=\u0022highwire-cite-metadata-volume highwire-cite-metadata\u0022\u003E8:\u003C\/span\u003E\u003Cspan class=\u0022highwire-cite-metadata-elocation-id highwire-cite-metadata\u0022\u003Ee000798. \u003C\/span\u003E\u003Cspan class=\u0022highwire-cite-metadata-doi highwire-cite-metadata\u0022\u003E\u003Cspan class=\u0022label\u0022\u003Edoi:\u003C\/span\u003E 10.1136\/jitc-2020-000798 \u003C\/span\u003E\u003C\/div\u003E\n  \n  \n  \n\u003C\/div\u003E\u003C\/div\u003E  \u003C\/div\u003E\n\n  \n  \u003C\/div\u003E\n\u003Cdiv class=\u0022panel-separator\u0022\u003E\u003C\/div\u003E\u003Cdiv class=\u0022panel-pane pane-panels-mini pane-jnl-template-bmjj-art-pub-history\u0022\u003E\n  \n      \n  \n  \u003Cdiv class=\u0022pane-content\u0022\u003E\n    \u003Cdiv class=\u0022panel-display highwire-1col-stacked-layout\u0022 id=\u0022mini-panel-jnl_template_bmjj_art_pub_history\u0022\u003E\n\t  \n  \u003Cdiv class=\u0022panel-row-wrapper clearfix\u0022\u003E\n\t\t\n\t\t\u003Cdiv class=\u0022content-wrapper\u0022\u003E\n\t\t\t\u003Cdiv class=\u0022panel-panel panel-region-content\u0022\u003E\n\t\t\t  \u003Cdiv class=\u0022inside\u0022\u003E\u003Cdiv class=\u0022panel-pane pane-highwire-pubdate bmjj-pub-date\u0022\u003E\n  \n      \n  \n  \u003Cdiv class=\u0022pane-content\u0022\u003E\n    \u003Cdiv class=\u0022field field-name-field-highwire-a-epubdate field-type-datetime field-label-inline clearfix\u0022\u003E\u003Cdiv class=\u0022field-label\u0022\u003EOnline issue publication\u0026nbsp;\u003C\/div\u003E\u003Cdiv class=\u0022field-items\u0022\u003E\u003Cdiv class=\u0022field-item even\u0022\u003E\u003Cspan class=\u0022date-display-single\u0022\u003EJanuary 11, 2022\u003C\/span\u003E\u003C\/div\u003E\u003C\/div\u003E\u003C\/div\u003E  \u003C\/div\u003E\n\n  \n  \u003C\/div\u003E\n\u003C\/div\u003E\n\t\t\t\u003C\/div\u003E\n\t\t\u003C\/div\u003E\n\t\n\t\u003C\/div\u003E \u003C!-- \/.panel-row-wrapper --\u003E\t\n\t\n\t\u003C\/div\u003E\n\n  \u003C\/div\u003E\n\n  \n  \u003C\/div\u003E\n\u003Cdiv class=\u0022panel-separator\u0022\u003E\u003C\/div\u003E\u003Cdiv class=\u0022panel-pane pane-custom pane-1\u0022\u003E\n  \n        \u003Ch2 class=\u0022pane-title\u0022\u003ERequest permissions\u003C\/h2\u003E\n    \n  \n  \u003Cdiv class=\u0022pane-content\u0022\u003E\n    \u003Cp\u003EIf you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center\u0026rsquo;s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.\u003C\/p\u003E\n  \u003C\/div\u003E\n\n  \n  \u003C\/div\u003E\n\u003Cdiv class=\u0022panel-separator\u0022\u003E\u003C\/div\u003E\u003Cdiv class=\u0022panel-pane pane-panels-ajax-pane-content pane-highwire-permission-link\u0022\u003E\n  \n        \u003Ch2 class=\u0022pane-title\u0022\u003E\u003Cspan class=\u0022panels-ajax-pane-title\u0022 data-pid=\u0022new-d5e9ecaa-460b-40c1-87fb-0dbcbc3a749d\u0022\u003E\u003C\/span\u003E\u003C\/h2\u003E\n    \n  \n  \u003Cdiv class=\u0022pane-content\u0022\u003E\n    \u003Cdiv class=\u0022panels-ajax-pane panels-ajax-pane-new-d5e9ecaa-460b-40c1-87fb-0dbcbc3a749d\u0022 data-pid=\u0022new-d5e9ecaa-460b-40c1-87fb-0dbcbc3a749d\u0022\u003E\u003C\/div\u003E  \u003C\/div\u003E\n\n  \n  \u003C\/div\u003E\n\u003Cdiv class=\u0022panel-separator\u0022\u003E\u003C\/div\u003E\u003Cdiv class=\u0022panel-pane pane-highwire-copyright\u0022\u003E\n  \n        \u003Ch2 class=\u0022pane-title\u0022\u003ECopyright information\u003C\/h2\u003E\n    \n  \n  \u003Cdiv class=\u0022pane-content\u0022\u003E\n    \u003Cdiv class=\u0022field field-name-field-highwire-copyright field-type-text field-label-hidden\u0022\u003E\u003Cdiv class=\u0022field-items\u0022\u003E\u003Cdiv class=\u0022field-item even\u0022\u003E\u003Cspan class=\u0022nlm-copyright-statement\u0022 data-hwp-id=\u0022copyright-statement-1\u0022\u003E\u0026Acirc;\u0026copy; Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.\u003C\/span\u003E \u003Cspan class=\u0022nlm-license\u0022 data-license-type=\u0022open-access\u0022 data-xlink-href=\u0022http:\/\/creativecommons.org\/licenses\/\u0022 data-hwp-id=\u0022license-1\u0022\u003E\u003Cspan class=\u0022ali-license_ref\u0022 data-start_date=\u00222020-05-05\u0022\u003E\u003Ca href=\u0022http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/\u0022\u003Ehttp:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/\u003C\/a\u003E\u003C\/span\u003E\u003Cspan class=\u0022nlm-p\u0022 data-hwp-id=\u0022p-1\u0022\u003EThis is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See \u003Ca class=\u0022nlm-ext-link\u0022 data-l-rel=\u0022related\u0022 data-l-ref-type=\u0022uri\u0022 data-l-ref=\u0022http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/\u0022 data-ext-link-type=\u0022uri\u0022 data-xlink-href=\u0022http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/\u0022 data-hwp-id=\u0022ext-link-1\u0022 href=\u0022http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/\u0022\u003Ehttp:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/\u003C\/a\u003E.\u003C\/span\u003E\u003C\/span\u003E\u003C\/div\u003E\u003C\/div\u003E\u003C\/div\u003E  \u003C\/div\u003E\n\n  \n  \u003C\/div\u003E\n\u003C\/div\u003E\n\t\t\t\u003C\/div\u003E\n\t\t\u003C\/div\u003E\n\t\n\t\u003C\/div\u003E \u003C!-- \/.panel-row-wrapper --\u003E\t\n\t\n\t\u003C\/div\u003E\n\n\u003C\/div\u003E\u003Cscript type=\u0022text\/javascript\u0022 src=\u0022\/\/crossmark-cdn.crossref.org\/widget\/v2.0\/widget.js\u0022\u003E\u003C\/script\u003E\u003C\/body\u003E\u003C\/html\u003E\n"}