RT Journal Article SR Electronic T1 Overcoming resistance to anti-PD1 and anti-PD-L1 treatment in gastrointestinal malignancies JF Journal for ImmunoTherapy of Cancer JO J Immunother Cancer FD BMJ Publishing Group Ltd SP e000404 DO 10.1136/jitc-2019-000404 VO 8 IS 1 A1 Puccini, Alberto A1 Battaglin, Francesca A1 Iaia, Maria Laura A1 Lenz, Heinz-Josef A1 Salem, Mohamed E YR 2020 UL http://jitc.bmj.com/content/8/1/e000404.abstract AB Markup server — Error Not Found The page you were trying to reach could not be found. Please check the address for the page you were trying to reach. If you believe you have reached this page in error, you may contact us with any questions.