685PRelation of overall survival, progression free survival, post progression survival and response rate in four randomized Japanese phase III trials comparing various combinations of S-1 therapy for first-line treatment of advanced gastric cancer. (23rd October 2018) - Takeuchi, M; Ichikawa, W; Shitara, K; Sunakawa, Y; Oba, K; Koizumi, W; Sakata, Y; Furukawa, H; Takeuchi, M; Fujii, M