[1] Nagoya Univ, Surg Oncol, Grad Sch Med, Showa Ku, 65 Tsurumai Cho, Nagoya, Aichi 4668560, Japan
[2] Nagoya Univ, Gastroenterol Surg, Grad Sch Med, Showa Ku, 65 Tsurumai Cho, Nagoya, Aichi 4668560, Japan
[3] Nagoya Univ, Gastroenterol, Grad Sch Med, Showa Ku, 65 Tsurumai Cho, Nagoya, Aichi 4668560, Japan
[4] Nagoya Univ, Clin Oncol & Chemotherapy, Grad Sch Med, Showa Ku, 65 Tsurumai Cho, Nagoya, Aichi 4668560, Japan
[5] Nagoya Univ, Radiol, Grad Sch Med, Showa Ku, 65 Tsurumai Cho, Nagoya, Aichi 4668560, Japan
[6] Acad Assembly Univ Toyama, Dept Surg & Sci, Fac Med, 2630 Sugitani, Toyama 9300194, Japan