Affiliation: | 1. Division of Gastroenterology and Hepatology, Musashino Red Cross Hospital, , Tokyo, Japan;2. Division of Pathology, Musashino Red Cross Hospital, , Tokyo, Japan;3. Division of Gastroenterology and Hepatology, St Marianna University School of Medicine, , Kanagawa, Japan;4. Division of Gastroenterology and Hepatology, Tokyo Medical and Dental University, , Tokyo, Japan |