| Affiliation: | 1.Department of Gastroenterology, Graduate School of Medicine,The University of Tokyo,Tokyo,Japan;2.Department of Gastroenterology,Cancer Institute Hospital of Japanese Foundation for Cancer Research,Tokyo,Japan;3.Department of Gastroenterology,JR Tokyo General Hospital,Tokyo,Japan;4.Department of Gastroenterology,Tokyo Metropolitan Police Hospital,Tokyo,Japan;5.Department of Gastroenterology,Kanto Central Hospital,Tokyo,Japan;6.Department of Gastroenterology,Japanese Red Cross Medical Center,Tokyo,Japan;7.Department of Gastroenterology,Mitsui Memorial Hospital,Tokyo,Japan |
