[1] Fujita Hlth Univ, Dept Adv Robot & Endoscop Surg, Toyoake, Japan
[2] Fujita Hlth Univ, Dept Surg, 1-98 Dengakugakubo, Toyoake, Aichi 4701192, Japan
[3] Kanazawa Univ, Dept Gastrointestinal Surg, Kanazawa, Japan
[4] Saitama Canc Ctr, Dept Gastrointestinal Surg, Gastr Surg Div, Saitama, Japan
[5] Toho Univ, Sakura Med Ctr, Dept Surg, Sakura, Japan
[6] New Tokyo Hosp, Dept Gastroenterol Surg, Matsudo, Japan
[7] Kyoto Univ, Grad Sch Med, Dept Surg, Kyoto, Japan
[8] Weight Loss & Metab Surg Ctr, Yotsuya Med Cube, Tokyo, Japan
[9] Natl Canc Ctr Hosp East, Gastr Surg Div, Kashiwa, Japan
[10] Osaka Univ, Grad Sch Med, Dept Gastroenterol Surg, Suita, Japan
[11] Dokkyo Med Univ, Dept Upper Gastrointestinal Surg, Tochigi, Japan
[12] Oita Univ, Dept Gen Surg, Ctr Community Med, Fac Med, Yufu, Japan
[13] Nagoya City Univ, Grad Sch Med Sci, Dept Gastroenterol Surg, Nagoya, Japan
[14] Tokyo Med & Dent Univ, Dept Gastrointestinal Surg, Yushima, Japan
[15] Kitasato Univ, Sch Med, Dept Lower Gastrointestinal Surg, Sagamihara, Japan
[16] Japanese Red Cross Fukuoka Hosp, Dept Surg, Fukuoka, Japan
[17] Okayama Univ Hosp, Dept Gastroenterol Surg, Okayama, Japan
[18] JFCR, Gastr Surg Dept, Canc Inst Hosp, Tokyo, Japan
[19] Juntendo Univ Hosp, Dept Gastroenterol & Minimally Invas Surg, Tokyo, Japan
[20] Tokyo Womens Med Univ, Inst Gastroenterol, Dept Surg, Tokyo, Japan
[21] JFCR, Canc Inst Hosp, Tokyo, Japan
[22] Kyushu Univ, Grad Sch Med Sci, Dept Surg & Oncol, Fukuoka, Japan
[23] Oita Univ, Fac Med, Dept Gastroenterol & Pediat Surg, Yufu, Japan