Adjuvant chemoimmunotherapy vs. capecitabine vs. observation in resected biliary tract cancer: a multi-center retrospective study

Chengjie Li, Mingjian Piao, Zibo Xu, Weixuan Pan, Shuman Kuang, Ziyue Huang, Nan Zhang, Jiongyuan Li, Shuofeng Li, Guanhua Yu, Shi Feng, Hu Li, Zhe Zhu, Binhe Tian, Xiaobo Yang, Chengpei Zhu, Daobing Zeng, Zhenyu Zhu, Yongliang Sun, Weidong Duan, Haitao Zhao