RecruitingPhase 2Combination productCadonilimab Combined With Liposomal Irinotecan Plus Leucovorin and Fluorouracil for Advanced CholangiocarcinomaThis study aimed to evaluate the efficacy and safety of the combination of cadonilimab with liposomal irinotecan plus fluorouracil and leucovorin for the treatment of advanced biliary tract cancer.