A phase I study for adjuvant chemotherapy of gemcitabine plus S-1 in curatively resected patients with biliary tract cancer: adjusting the dose of adjuvant chemotherapy according to the surgical procedures.

A phase I study for adjuvant chemotherapy of gemcitabine plus S-1 in curatively resected patients with biliary tract cancer: adjusting the dose of adjuvant chemotherapy according to the surgical procedures.