[1] Aichi Canc Ctr, Nagoya, Aichi, Japan
[2] Hokkaido Univ, Dept Gastroenterol Surg 2, Fac Med, Sapporo, Hokkaido, Japan
[3] Dokkyo Med Univ, Saitama Med Ctr, Dept Surg, Koshigaya, Japan
[4] Dokkyo Med Univ, Dept Surg 2, Mibu, Tochigi, Japan
[5] Shizuoka Canc Ctr, Div Hepatobiliary Pancreat Surg, Nagaizumi, Shizuoka, Japan
[6] Tohoku Univ, Dept Surg, Grad Sch Med, Sendai, Miyagi, Japan
[7] Nagoya Univ, Dept Surg, Grad Sch Med, Nagoya, Aichi, Japan
[8] Natl Canc Ctr Hosp East, Dept Hepatobiliary Pancreat Surg, Kashiwa, Chiba, Japan
[9] Teikyo Univ, Dept Surg, Sch Med, Tokyo, Japan
[10] Natl Canc Ctr, Hepatobiliary & Pancreat Surg Div, Tokyo, Japan
[11] Teikyo Univ, Dept Surg, Chiba Med Ctr, Ichihara, Chiba, Japan
[12] Tokyo Womens Med Univ, Inst Gastroenterol, Dept Surg, Tokyo, Japan
[13] Niigata Univ, Div Digest & Gen Surg, Grad Sch Med & Dent Sci, Niigata, Japan
[14] Juntendo Univ, Grad Sch Med, Dept Gastroenterol, Tokyo, Japan
[15] Natl Canc Ctr, Dept Hepatobiliary & Pancreat Oncol, Tokyo, Japan
[16] Chiba Prefectural Sawara Hosp, Dept Gastroenterol, Sawara, Japan
[17] Fujita Hlth Univ, Dept Gastroenterol & Gastroenterol Oncol, Toyoake, Aichi, Japan
[18] Kyorin Univ, Dept Med Oncol, Fac Med, Mitaka, Tokyo, Japan
[19] Teine Keijinkai Hosp, Educ & Res Ctr, Sapporo, Hokkaido, Japan
[20] Aichi Med Univ, Dept Radiol, Nagakute, Aichi, Japan
[21] Kyoto Prefectural Univ Med, Grad Sch Med Sci, Dept Radiol, Kyoto, Japan
[22] Hirosaki Univ, Dept Pathol & Biosci, Grad Sch Med, Hirosaki, Aomori, Japan
[23] Japanese Red Cross Kyoto Diichi Hosp, Dept Pathol, Kyoto, Japan
[24] Int Univ Hlth & Welf, Dept Hepatobiliary Pancreat & Gastrointestinal Su, Ichikawa, Japan
[25] Yokohama City Univ, Grad Sch Med, Dept Gastroenterol Surg, Yokohama, Kanagawa, Japan