National Cancer Center Hospital - Gastrointestinal Medical Oncology Division, National Cancer Center Hospital, Showa University, National Cancer Center Hospital, Tokai University, Kanagawa Cancer Center - Department of Gastrointestinal Surgery, Saitama Cancer Center, Aichi Cancer Center, Aichi Cancer Center, Niigata Cancer Center Hospital, Shizuoka General Hospital, Keio University, Kochi University - Kochi Health Sciences Center, Shizuoka Cancer Center, Hyogo Cancer Center, Shikoku Cancer Centre, Kumamoto University - Department of Gastroenterological Surgery, Toranomon Hospital, Hamamatsu University, National Cancer Center Hospital, Keio University - Department of Surgery and Independent

Kyoto University - Department of Therapeutic Oncology, Kitasato University - Department of Gastroenterology, National Institute of Public Health - Department of Health Promotion, National Cancer Center Hospital East - Department of Gastroenterology and Endoscopy, National Cancer Center Hospital - Endoscopy Division, Kyoto University - Department of Therapeutic Oncology, Kitasato University - Research and Development Center for New Frontiers, Hokkaido University Hospital - Division of Endoscopy, Kanazawa Medical Association, Tohoku University Graduate School of Medicine - Division of Gastroenterology, Shizuoka Cancer Center - Division of Endoscopy, National Hospital Organization (NHO) - Osaka National Hospital, Department of Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences - Department of Gastroenterology and Hepatology, Kanagawa Cancer Center - Department of Gastrointestinal Surgery, Showa Medical University - Division of Gastroenterology, Kumamoto Regional Medical Center - Department of Gastroenterology, St. Marianna University - Division of Gastroenterology and Hepatology, Keio University, Kawasaki Municipal Kawasaki Hospital - Department of Surgery, Tochigi Cancer Center - Department of Gastroenterology, Shizuoka Cancer Center - Department of Diagnostic Pathology, National Cancer Center, Japan - Exploratory Oncology Research and Clinical Trial Center, Kyoto Prefectural University of Medicine - Department of Molecular-Targeting Prevention, National Hospital Organization (NHO) - Kurihama Medical and Addiction Center, Clinical Research Unit and Independent

Fukushima Medical University, Kanagawa Cancer Center, Fukushima Medical University, Kanagawa Cancer Center - Department of Gastrointestinal Surgery, Fukushima Medical University, Kanagawa Cancer Center, Fukushima Medical University, Kanagawa Cancer Center, Fukushima Medical University, Fukushima Medical University, Kanagawa Cancer Center, Kanagawa Cancer Center, Iwate Medical University, Kanagawa Cancer Center and Fukushima Medical University - Department of Gastrointestinal Tract Surgery