^○Hideaki Murase, Ryou Oono, Yuu Hiraoka, Satoshi Yoshinouchi, Tsuyoshi Yoshida, Megumu Enjoji (Depart of Surgery, Nakano General Hospital, Japan)

^○Masatomo Kanno, Yousuke Kunishi, Koichiro Yoshie, Yuri Iwata, Mao Matsubayashi, Yoshihumi Ono, Setsuo Tamai, Yoshio Kato (Ashigarakami Hospital,Matsuda Town,Ashigarakami County,Kanagawa,Japan)

^○Takamasa Yabuta¹, Masaki Fujimori¹, Kimiko Itou¹, Aya Gouhara¹, Sunsuke Takahashi¹, Daiti Mitudou¹, Yuuki Tukamoto¹, sinnji Kitamura¹, Tameyosi Yamamoto² (1.Dept. of Gastroenterology, Sakai Municipal Hospital, Osaka, Japan., 2.Department of Surgery, Sakai Municipal Hospital, Osaka, Japan.)

^○Tomohiro Kudo, Haruka Yoshida, Yudai Okano, Yuhei Suzuki, Keisuke Shiina, Eri Hayashi, Takashi Hoshino, Naomi Miyamae, Atsushi Naganuma, Shinya Saruya, Hiroshi Ishihara (National Hospital Organization, Takasaki General Medical Center, Gunma, Japan)

^○Naoki Azuma, Kazuhisa Fukuda, Naoyuki Kawamura, Nobuo Sekiyama, Tsuyoshii Okamura (Dept. of Gastroenterology, Sapporo Tokushukai Hospital, Sapporo, Japan)