^○Kumiko Yamamoto, Tomoki Inaba, Shigenao Ishikawa, Masaya Ishida, Tomo Kagawa, Sakiko Kuraoka, Ichiro Sakakihara, Koichi Izumikawa, Sakuma Takahashi, Shigetomi Tanaka, Mihoko Matsuura, Masaki Wato, Toshimi Hasui (Dept. of Medical Gastroenterology, Kagawa Prefectural Central Hospital, Kagawa, Japan)

^○Hirotsugu Ohara, Yasuhiko Masuda (Depr. of Surgery Fujieda Heisei Memorial Hospital Shizuoka. Japan)

^○hidetaka okubo, Junichi Akiyama, Toshiyuki Sakurai, kazuhiro watanabe, Etsuko Yokota, Naoyoshi Nagata, chizu yokoi, Koki Okahara, Takayuki Shimada, Yusuke Takasaki, Eri Kihira, Hourin Cho, Masahiro Hata, Shiori Moriyasu, Yuya Hisada, Sho Shiroma, Katsunori Sekine (National Center For Global Health and Medicine. Tokyo,Japan)

^○Yushi Kimura, Tokuma Tanuma, Taku Harada, Shinji Urade, Hideaki Koga, Itaru Yamamoto, Masafumi Nomura, Hiroyuki Maguchi (Center For Gastroenterology,Teine Keijinkai Hospital,Sapporo,Japan)