[1] Osaka Med Ctr Canc & Cardiovasc Dis, Dept Hepatobiliary & Pancreat Oncol, Osaka, Japan
[2] Osaka Med Ctr Canc & Cardiovasc Dis, Hepatobiliary & Pancreat Oncol, Osaka, Japan
[3] Osaka Med Ctr Canc & Cardiovasc Dis, Osaka, Japan
[4] Osaka Med Ctr Canc & CVD, Dept Pancreat Surg, Osaka, Japan