Daisuke Takahari, Seiji Ito, Junki Mizusawa, Hiroshi Katayama, Masanori Terashima, Mitsuru Sasako, Shinji Morita, Takashi Nomura, Makoto Yamada, Yoshiyuki Fujiwara, Yutaka Kimura, Atsuki Ikeda, Yoshio Kadokawa, Takeshi Sano, the Stomach Cancer Study Group of the Japan Clinical Oncology Group
Emma C. Gertsen, Lucas Goense, Hylke J. F. Brenkman, Richard van Hillegersberg, Jelle P. Ruurda, the Dutch Upper Gastrointestinal Cancer Audit (DUCA) group