Institution: | (1) Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan;(2) First Department of Internal Medicine, University of Yamanashi, Chuo, Japan;(3) First Department of Internal Medicine, School of Medicine, University of the Ryukyus, Okinawa, Japan |