[1] Chiba Cancer Center,Department of Gastroenterology
[2] Chiba University,Department of Gastroenterology and Nephrology, Graduate School of Medicine
[3] Kameda Medical Center,Department of Gastroenterology
[4] Saitama Medical University,Department of Hepato
[5] Saitama Red Cross Hospital,biliary
[6] Kimitsu Chuo Hospital,pancreatic Surgery, Saitama Medical Center
[7] Asahi General Hospital,Department of Gastroenterology
[8] Mito Saiseikai General Hospital,Department of Gastroenterology
[9] Tokyo Women’s Medical University Yachiyo Medical Center,Department of Gastroenterology
[10] Numazu City Hospital,Department of Internal Medicine