1Gastrointestinal Cancer Center, Sano Hospital, 2-5-1 Shimizugaoka, Tarumi-ku, Kobe-shi, Hyogo 655-0031 Japan
2Department of Anesthesiology, Shimane University Faculty of Medicine, 89-1 Enyacho, Izumo City, Shimane 693-8501 Japan
3Department of Gastroenterological Surgery, Kansai Rosai Hospital, 3-1-69 Inabaso, Amagasaki-shi, Hyogo 660-8511 Japan
4Colorectal Surgery, National Hospital Organization Osaka National Hospital, 2-1-14 Hoenzaka, Chuo-ku, Osaka City, Osaka 540-0006 Japan
5Department of Medical Oncology, Kobe City Medical Center General Hospital, 2-1-1 Minatojimaminamimachi, Chuo-ku, Kobe-city, Hyogo 650-0047 Japan
6Cancer Treatment Center, Kansai Medical University Hospital, 2-3-1 Shin-machi, Hirakata City, Osaka 573-1191 Japan
7Department of Hematology/Oncology, Japan Community Healthcare Organization Kyushu Hospital, 1-8-1 Kishinoura, Yahatanishi-ku, Kitakyusyu-shi, Fukuoka 806-8501 Japan
8Cancer Center, Gifu University Hospital, 1-1 Yanagido, Gifu, 501-1194 Japan
9Department of Medical Oncology, Tonan Hospital, Kita 4-jo Nishi 7-chome 3-8, Chuo-ku, Sapporo-shi, Hokkaido 060-0004 Japan
10Division of Clinical Oncology, Hiroshima Prefectural Hospital, 1-5-54 Ujinakanda, Minami-ku, Hiroshima-shi, Hiroshima 734-8530 Japan
11Department of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama-city, Okayama 700-8558 Japan
12Department of Gastrointestinal Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871 Japan
13Department of Surgery, NTT Medical Center Tokyo, 5-9-22 Higashi-Gotanda, Shinagawa-ku, Tokyo 141-8625 Japan
14Department of Surgery, Kitakyushu General Hospital, 1-1 Higashijono-machi, Kokurakita-ku, Kitakyushu, 802-8517 Japan
15Department of Surgery, Nerima General Hospital, 1-24-1 Asahigaoka, Nerima-ku, Tokyo 176-8530 Japan
16Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8560 Japan
17Clinical Development Center, Asahi Kasei Pharma Corporation, 1-1-2 Yurakucho, Chiyoda-ku, Tokyo 100-0006 Japan
18Division of Gastroenterology, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577 Japan
19Division of Gastrointestinal Medical Oncology, NHO Shikoku Cancer Center, 160 Kou Minami-umemoto, Matsuyama-city, Ehime 791-0280 Japan