Affiliation: | 1. Division of Gastroenterology, Department of Internal Medicine, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan;2. Core Research Facilities for Basic Science, Research Center for Medical Sciences, Jikei University School of Medicine, Tokyo, Japan;3. Division of Gastroenterology and Hepatology, Chiba Tokushukai Hospital, Chiba, Japan;4. Division of Gastroenterology and Hepatology, Jikei University School of Medicine Katsusika Medical Center, Tokyo, Japan |