^○Koichi Nakadoi, Juri Ikemoto, Kozue Kanemitsu, Yuji Teraoka, Yoshihiro Izumi, Akihito Okazaki, Hiroki Imagawa, Yoshio Katamura, Seiji Onogawa, Naomichi Hirano, Hajime Amano, Keiji Hanada (Dept. of Gastroenterology, Ja Onomichi General Hospital, Onomichi, Japan)

^○Seiji Onogawa, Juri Ikemoto, Kozue Kanemitsu, Yuji Teraoka, Yoshihiro Izumi, Koichi Nakadoi, Akihito Okazaki, Hiroki Imagawa, Yoshio Katamura, Naomichi Hirano, Keiji Hanada, Hajime Amano, Fumiaki Hino (Dept. of Gastroenterology, Onomichi General Hospital, Japan)

^○Keiji Takahashi, Haruo Nishino, Hiroshi Nozawa (Coloproctology Center Matsushima Clinic, Yokohama, Japan)

^○Yoichi Kobayashi, Haruo Nishino, Yasumoto Suzuki (Matsushima Clinic,Yokohama,Kanagawa,Japan)

^○Naoyuki Uragami, Masanori Isozaki, Genki Tsukuda, Kai matsuo, Kuniyo Gomi, Chiaki Sato, Michitaka Suzuki, Syuei Arima, Yohei Kitamura, Haruo Ikeda, Manabu Onimaru, Noboru Yokoyama, Masaaki Matsukawa, Haruhiro Inoue (Showa University Koto Toyosu Hospital, Japan)