^○Hiroki Hara¹, Taroh Satoh², Takashi Kojima³, Satoru Motoyama⁴, Takahiro Tsushima⁵, Yu Sunakawa⁶, Morihito Okada⁷, Aiyang Tao⁸, Ningning Ding⁸, Ken Kato⁹ (1.Department of Gastroenterology, Saitama Cancer Center, Saitama, Japan, 2.Department of Frontier Science for Cancer and Chemotherapy, Osaka University Graduate School of Medicine, Osaka, Japan, 3.Department of Gastroenterology and Gastrointestinal Oncology, National Cancer Center Hospital East, Kashiwa, Japan, 4.Department of Esophageal Surgery, Akita University Hospital, Akita, Japan, 5.Division of Gastrointestinal Oncology, Shizuoka Cancer Center, Shizuoka, Japan, 6.Department of Clinical Oncology, St. Marianna University School of Medicine, Kanagawa, Japan, 7.Department of Surgical Oncology, Hiroshima University, Hiroshima, Japan, 8.BeiGene Ltd, Zhongguancun Life Science Park, Beijing, China, 9.Department of Head and Neck Esophageal Medical Oncology, National Cancer Center Hospital, Tokyo, Japan)

^○Shun Yamamoto¹, Keisho Chin², Masanobu Takahashi³, Shigenori Kadowaki⁴, Yutaro Kubota⁵, Yusuke Amanuma⁶, Morihito Okada⁷, Mitsuro Kanda⁸, Yasue Kimura⁹, Yuhiko Nogi¹⁰, Yuko Arimitsu¹¹, Yuko Kitagawa¹² (1.Department of Head and Neck, Esophageal Medical Oncology, National Cancer Center Hospital, 2.Department of Gastroenterological Chemotherapy, Cancer Institute Hospital, Japanese Foundation for Cancer Research, 3.Department of Medical Oncology, Tohoku University Hospital, 4.Department of Clinical Oncology, Aichi Cancer Center Hospital, 5.Division of Medical Oncology, Department of Medicine, Showa University School of Medicine, 6.Department of Clinical Trial Promotion, Chiba Cancer Center, 7.Department of Surgical Oncology, Hiroshima University, 8.Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, 9.Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, 10.Department of Oncology Medical, Bristol-Myers Squibb, 11.Department of Oncology Medical Affairs, ONO Pharmaceutical Company, 12.Department of Surgery, Keio University School of Medicine)

^○Kenro Tanoue¹, Hirofumi Ohmura¹, Kenji Tsuchihashi¹, Yudai Shinohara³, Mamoru Ito¹, Kyoko Yamaguchi¹, Shingo Tamura², Hozumi Shimokawa³, Taichi Isobe¹, Yoshihiro Shibata⁵, Hiroshi Ariyama¹, Risa Tanaka⁴, Hitoshi Kusaba¹, Taito Esaki⁶, Kenji Mitsugi⁷, Koichi Akashi¹, Eishi Baba⁸ (1.Department of Medicine and Biosystemic Science, Graduate School of Medical Sciences, Kyushu University, 2.Department of Medical Oncology, Clinical Research Institute, National Hospital Organization Kyushu Medical Center, 3.Department of Hematology/Oncology, Japan Community Healthcare Organization Kyushu Hospital, 4.Department of Medical Oncology, Hamanomachi Hospital, 5.Department of Medical Oncology, Fukuoka Wajiro Hospital, 6.Department of Gastrointestinal and Medical Oncology, National Kyushu Cancer Center, 7.Department of Medical Oncology, Sasebo Kyosai Hospital, 8.Department of Oncology and Social Medicine, Graduate School of Medical Sciences, Kyushu University)

^○Nozomu Machida¹, Masanori Tokunaga², Junki Mizusawa³, Hiroshi Yabusaki⁴, Hirofumi Yasui⁵, Motohiro Hirao⁶, Masaya Watanabe⁷, Takushi Yasuda⁸, Takahiro Kinoshita⁹, Hiroshi Imamura¹⁰, Jun Hihara¹¹, Tomoko Kataoka³, Narikazu Boku¹², Takaki Yoshikawa¹³, Takeshi Sano¹⁴, Mitsuru Sasako¹⁵, Masanori Terashima¹⁶ (1.Department of Gastroenterology, Kanagawa Cancer Center, 2.Tokyo Medical and Dental University, Gastrointestinal Surgery, 3.Japan Clinical Oncology Group Data Center/Operations Office, 4.Niigata Cancer Center Hospital, Division of Surgery, 5.Shizuoka Cancer Center, Division of Gastrointestinal Oncology, 6.National Hospital Organization Osaka National Hospital, Department of Surgery, 7.Shizuoka General Hospital, Department of Gastroenterological Surgery, 8.Kindai University Faculty of Medicine, Department of Surgery, 9.National Cancer Center Hospital East, Department of Gastric Surgery, 10.Toyonaka Municipal Hospital, Department of Surgery, 11.Hiroshima City Asa Citizens Hospital, Department of Surgery, 12.IMS Hospital, Institute of Medical Science, University of Tokyo, Department of Medical Oncology and General Medicine, 13.National Cancer Center Hospital, Department of Gastric Surgery, 14.The Cancer Institute Hospital, Japanese Foundation for Cancer Research, Department of Gastroenterological Surgery, 15.Yodogawa Christian Hospital, Department of Surgery, 16.Shizuoka Cancer Center, Division of Gastric Surgery)

^○Kensei Yamaguchi¹, Ooki Akira¹, Kang Yoon-Koo², Lee Keun-Wook³, Bai Li-Yuan⁴, Collins Helen⁵, Yang Yingsi⁵, Mezzi Khalid⁵, Catenacci Daniel⁶, Enzinger Peter⁷, Wainberg Zev⁸ (1.Department of Gastroenterological Chemotherapy, Cancer Institute Hospital of Japanese Foundation for Cancer Research, 2.University of Seoul, South Korea, 3.Seoul National University Bundang Hospital,South Korea, 4.China Medical University, Taiwan, 5.Amgen Inc, United States, 6.University of Chicago, United States, 7.Dana Farber Cancer Institute, United States, 8.University of California, Los Angeles, United States)

^○Yasuhiro Sakamoto¹, Yukiya Narita², Toshihiro Misumi³, Hiroshi Matsuoka⁴, Hiroaki Tanioka⁵, Takeshi Kawakami⁶, Tomohiro Matsushima⁷, Hiroto Miwa⁸, Hirokazu Shoji⁹, Atsushi Ishiguro¹⁰, Sachio Fushida¹¹, Kou Miura¹², Takanobu Yamada¹³, Katsunori Shinozaki¹⁴, Takuro Mizukami¹⁵, Tomohiro Nishina¹⁶, Toshikazu Moriwaki¹⁷, Seiichiro Mitani¹⁸, Michio Nakamura¹⁹, Kei Muro² (1.Department of Medical Oncology, Osaki Citizen Hospital, 2.Department of Clinical Oncology, Aichi Cancer Center Hospital, 3.Department of Biostatistics, Yokohama City University School of Medicine, 4.Department of Gastrointestinal Surgery School of Medicine, Fujita Health University Hospital, 5.Department of Clinical Oncology, Kawasaki Medical School, 6.Division of Gastrointestinal Oncology, Shizuoka Cancer Center, 7.Department of Gastroenterology, Saitama Cancer Center, 8.Division of Gastroenterology and Hepatology, Hyogo College of Medicine, 9.Department of Gastrointestinal Medical Oncology, National Cancer Center Hospital, 10.Department of Medical Oncology, Teine Keijinkai Hospital, 11.Department of Gastroenterological Surgery, Kanazawa University Graduate School of Medical Sciences, 12.Department of Internal Medicine, Himeji Red Cross Hospital, 13.Department of Gastrointestinal Surgery, Kanagawa Cancer Center, 14.Division of Clinical Oncology, Hiroshima Prefectural Hospital, 15.Department of Clinical Oncology, St. Marianna University School of Medicine, 16.Department of Gastrointestinal Medical Oncology, National Hospital Organization Shikoku Cancer Center, 17.Department of Gastroenterology, Faculty of Medicine, University of Tsukuba, 18.Department of Medical Oncology, Faculty of Medicine, Kindai University, 19.Department of Gastroenterology, Sapporo City General Hospital)