Efficacy, safety, and biomarker analysis of nivolumab in combination with abemaciclib plus endocrine therapy in patients with HR-positive HER2-negative metastatic breast cancer: a phase II study (WJOG11418B NEWFLAME trial) ============================================================================================================================================================================================================================== * Jun Masuda * Hitomi Sakai * Junji Tsurutani * Yuko Tanabe * Norikazu Masuda * Tsutomu Iwasa * Masato Takahashi * Manabu Futamura * Koji Matsumoto * Kenjiro Aogi * Hiroji Iwata * Mari Hosonaga * Toru Mukohara * Kiyoshi Yoshimura * Chiyo K Imamura * Sakiko Miura * Toshiko Yamochi * Hidetaka Kawabata * Hiroyuki Yasojima * Nobumoto Tomioka * Kenichi Yoshimura * Toshimi Takano