^○Haruhi Fukuhisa, Motoyuki Hashiguchi, Satoshi Iino, Masahiko Sakoda, Shoji Natsugoe (Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medical and Dental Sciences, Kagoshima University)

^○Naoki Oka, Ken Hayashi, Shigetoshi Yamada, Hiroshi Kusanagi (Department of Gastroenterological Surgery, Kameda General Hospital, Chiba, Japan)

^○Koichiro Fujimasa, Takeshi Aoki, Tomitake koizumi, Tomokazu Kusano, Kosuke Yamada, Yoshihiko Tashiro, Tomoki Hakozaki, kodai Tomioka, Akira Fujimori, Yota Enami, Masahiko Murakami (Department of Gastroenterological Surgery and General Surgery, School of Medicine, Showa University, Tokyo, Japan)

^○Toshimitsu Irei¹, Yuto Tedokon¹, Masuichi Gushiken², Tsuyoshi Tamae¹ (1.Department of Surgery, Chubu Tokushukai Hospital, Okinawa Japan, 2.Department of Radiology, Chubu Tokushukai Hospital, Okinawa Japan)

^○Kazuhiro Tada, Yukio Iwashita, Hiroki Uchida, Kunihiro Saga, Teijiro Hirashita, Yuichi Endo, Masayuki Ohta, Masafumi Inomata (Department of Gastroenterological and Pediatric Surgery, Oita University Faculty of Medicine, Oita, Japan)

^○Toshiyasu Kawahara¹, Kenji kobayashi², Kouji Imai¹, Masahiro Hagiwara¹, Takahashi Hiroyuki¹, Hidetoshi Matsunami³, Hiroyuki Furukawa¹ (1.Department of Surgery, Asahikawa Medical University, Asahikawa, Japan, 2.KARIYA TOYOTA GENERAL HOSPITAL, Aichi, Japan, 3.MATSUNAMI GENERAL HOSPITAL, Gifu, Japan)