Affiliation: | (1) Department of Gastroenterology and Hepatology, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan;(2) Department of Gastroenterological Endoscopy, Kyoto University Hospital, Kyoto;(3) Department of Pediatrics, Institute of Clinical Medicine, Tsukuba University, Ibaragi, Japan |