^○Yuichi Nagakawa, Yatsuka Sahara, Chie Takishita, Tomoki Shirota, Yosuke Hijikata, Hiroaki Osakabe, Shin Kobayashi, Tetsushi Nakajima, Yuichi Hosokawa, Kenji Katsumata, Akihiko Tsuchida (Department of Gastrointestinal and Pediatric Surgery, Tokyo Medical University)

^○Liu Rong, Tang Wenbo, Zhao Zhiming, Gao Yuanxing, Xu Yong (Chinese PLA General Hospital, Beijing, China)

^○Shin-E Wang, Yi-Ming Shyr (Division of General Surgery, Departments of Surgery, Taipei Veterans General Hospital / National Yang Ming University, Taipei, Taiwan)

^○Jin-Young Jang (Department of Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea)

^○Ichiro Uyama, Gohzo Kiguchi, Masayuki Kojima, Yutaro Kato, Akihiko Horiguchi, Atsushi Sugioka (Department of Surgery, Fujita Health University)