1. Departments of Gastroenterology, National Hospital Organization Ureshino Medical Center, Japan
2. Department of Internal Medicine, Saga Medical School, Japan
3. Department of Clinical Research Center, Saga Medical School, Japan
4. Departments of Gastroenterology, Karatsu Red Cross Hospital, Japan
5. Departments of Surgery, National Hospital Organization Ureshino Medical Center, Japan
6. Departments Surgery, Karatsu Red Cross Hospital, Japan