[1] Yokohama Municipal Citizens Hosp, Div Gastroenterol Surg, Yokohama, Kanagawa 2408555, Japan
[2] Shizuoka Canc Ctr, Div Gastr Surg, Shizuoka 4118777, Japan
[3] Chiba Univ, Ctr Frontier Med Engn, Chiba 2638522, Japan
[4] Kyushu Univ, Grad Sch Med, Dept Surg & Sci, Fukuoka 8128582, Japan
[5] Kagoshima Univ, Grad Sch Med, Dept Digest Surg, Kagoshima 8908544, Japan
[6] Kanazawa Med Sch, Dept Surg Oncol, Kanazawa, Ishikawa 9200265, Japan
[7] Nagasaki Univ, Grad Sch Biomed Sci, Ctr Comprehens Communi Care Educ, Nagasaki 8528523, Japan
[8] Int Univ Hlth & Welf Hosp, Dept Surg, Nasushiobara 3292763, Japan
[9] Kurume Univ, Sch Med, Dept Surg, Kurume, Fukuoka 8300011, Japan
[10] Nagoya Univ, Grad Sch Med, Dept Surg Gastroenterol, Nagoya, Aichi 4668560, Japan
[11] Jikei Univ Sch Med, Dept Lab Med, Tokyo 1058471, Japan