Institution: | Masanori Ochi, Toshiro Kamoshida, Yukako Hamano, Haruka Ohkawara, Atsushi Ohkawara, Nobushige Kakinoki, Yuji Yamaguchi, Shinji Hirai, Department of Gastroenterology, Hitachi General Hospital, Hitachi City 317-0077, Ibaraki, JapanRyosuke Kawagoe, Akinori Yanaka, Kiichiro Tsuchiya, Department of Gastroenterology, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8576, Ibaraki, Japan |