[1] Kobe University,Division of Gastrointestinal Surgery, Department of Surgery, Graduate School of Medicine
[2] Keio University,Department of Health Policy and Management, School of Medicine
[3] The University of Tokyo,Department of Healthcare Quality Assessment, Graduate School of Medicine
[4] Niigata University Medicine and Dental Hospital,Department of Medicine Informatics
[5] National Cancer Center Hospital,Department of Gastric Surgery
[6] Sanno Hospital,Center for Gastroenterology
[7] Osaka International Cancer Institute,Cancer Control Center
[8] Shizuoka Cancer Center,Endoscopic Division
[9] Kitasato University School of Medicine,Department of Advanced Medicine, Research and Development Center for New Medical Frontiers
[10] Teikyo University School of Medicine,Department of Surgery
[11] Aichi Cancer Center Hospital,Department of Clinical Oncology
[12] Cancer Institute Ariake Hospital,Department of Gastroenterological Surgery
[13] National Cancer Center Hospital,Endoscopy Division
[14] Keio University,Department of Surgery, School of Medicine