[1] Japanese Fdn Canc Res, Canc Inst Hosp, Div Hepatobiliary & Pancreat Surg, Tokyo 1358550, Japan
[2] Japanese Fdn Canc Res, Canc Inst Hosp, Dept Diagnost Imaging, Tokyo 1358550, Japan
[3] Juntendo Univ, Sch Med, Dept Hepatobiliary Pancreat Surg, Tokyo 1130033, Japan