Affiliation: | 1.Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan ;2.Department of Gastroenterology, Gunma Prefectural Cancer Center, Ohta, Gunma, Japan ;3.Department of Gastroenterology, National Hospital Organization Takasaki General Medical Center, Takasaki, Gunma, Japan ;4.Department of Gastroenterology, Isesaki Municipal Hospital, Isesaki, Gunma, Japan ;5.Department of Surgery, Japan Community Healthcare Organization Gunma Central Hospital, Maebashi, Gunma, Japan ; |