[1] Kyoto Univ, Grad Sch Med, Dept Clin Oncol & Pharmacogen, Sakyo Ku, Kyoto 6068507, Japan
[2] Kyoto Univ, Grad Sch Med, Dept Surg, Kyoto 6068507, Japan
[3] Osaka Univ, Grad Sch Med, Dept Surg, Osaka, Japan
[4] Natl Canc Ctr, Dept Expt Therapeut, Exploratory Oncol Res & Clin Trial Ctr, Tokyo, Japan
[5] Osaka Med Ctr Canc & Cardiovasc Dis, Dept Surg, Osaka, Japan
[6] Osaka Natl Hosp, Natl Hosp Org, Dept Surg, Osaka, Japan
[7] Shiga Univ Med Sci, Dept Surg, Otsu, Shiga, Japan
[8] Osaka City Univ, Grad Sch Med, Dept Hepatobiliary Pancreat Surg, Osaka 558, Japan
[9] Meiwa Gen Hosp, Dept Surg, Kobe, Hyogo, Japan
[10] Kansai Med Univ, Dept Surg, Osaka, Japan
[11] Kitano Hosp, Dept Gastroenterol Surg & Oncol, Osaka, Japan
[12] Kyoto Prefectural Univ Med, Dept Surg, Div Digest Surg, Kyoto 602, Japan
[13] Osaka Univ, Grad Sch Med, Dept Frontier Sci Canc & Chemotherapy, Osaka, Japan
[14] Kyoto Univ Hosp, Dept Gastroenterol & Hepatol, Grad Sch Med, Kyoto 606, Japan
[15] Kyoto Univ, Grad Sch Med, Dept Biomed Stat & Bioinformat, Kyoto 6068507, Japan
[16] Kobe Univ Hosp, Grad Sch Med, Dept Surg, Kobe, Hyogo, Japan
[17] Osaka Med Ctr Canc & Cardiovasc Dis, Dept Hepatobiliary & Pancreat Oncol, Osaka, Japan