ISS1-3-2Prognostic index model for overall survival in advanced unresectable pancreatic cancer from GEST study. (30th October 2015) - Hamamoto, Yasuo; Nagase, Michitaka; Egawa, Shinichi; Ueno, Hideki; Ohkawa, Shinichi; Funakoshi, Akihiro; Nakamori, Shoji; Kanai, Masashi; Ohashi, Yasuo; Furuse, Junji