[1] Kyorin University Faculty of Medicine,Department of Medical Oncology
[2] National Cancer Center Hospital,Department of Hepatobiliary and Pancreatic Oncology
[3] National Cancer Center,Biostatistics Division, Center for Research Administration and Support
[4] National Cancer Center Hospital East,Department of Hepatobiliary and Pancreatic Oncology
[5] Hyogo Cancer Center,Department of Gastroenterology
[6] Kobe City Medical Center General Hospital,Department of Medical Oncology
[7] Aichi Cancer Center Hospital,Department of Gastroenterology
[8] Ishikawa Prefectural Central Hospital,Department of Gastroenterology
[9] Niigata Cancer Center Hospital,Department of Internal Medicine
[10] National Hospital Organization Shikoku Cancer Center,Department of Gastrointestinal Medical Oncology
[11] Kyoto Prefectural University of Medicine,Department of Gastroenterology and Hepatology
[12] Sapporo Kosei General Hospital,Department of Gastroenterology
[13] Saga University,Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine
[14] Teine Keijinkai Hospital,Department of Medical Oncology
[15] Kyoto University,Department of Medical Oncology, Graduate School of Medicine
[16] Kanagawa Cancer Center,Department of Gastroenterology, Hepatobiliary and Pancreatic Medical Oncology Division
[17] St. Marianna University School of Medicine,Department of Clinical Oncology
[18] Saitama Cancer Center,Department of Gastroenterology
[19] Kobe University Graduate School of Medicine,Division of Gastroenterology, Department of Internal Medicine
[20] Sapporo Medical University School of Medicine,Department of Gastroenterology and Hepatology
[21] University of Miyazaki Hospital,Department of Clinical Oncology