Randomised phase III study of gemcitabine, cisplatin plus S-1 (GCS) compared with gemcitabine plus cisplatin (GC) for unresectable or recurrent biliary tract cancer (KHBO1401-MITSUBA).Tatsuya Ioka, Masashi Kanai, Shogo Kobayashi et al.|Journal of Clinical Oncology|2015Cited by 1