Masahiro Tsuda, Naotoshi Sugimoto, Junji Tanaka, Wataru Okamoto, Hiroyuki Okuda, Hiroshi Imamura, Jin Matsuyama, Toshio Shimokawa, Daisuke Sakai, Makio Gamoh, Yukinori Kurokawa, Yoshito Komatsu, Toshimasa Tsujinaka, Hiroshi Furukawa, A phase ll study of trastuzumab in combination with triweekly S-1 plus CDDP in HER2-positive advanced gastric cancer ; OGSG1101, HGCSG1102, T-CORE1101 Intergroup study (HERBIS-1 trial), IGCC 2013.