[1] Zhejiang Univ, Sch Med, Affiliated Hosp 2, Dept Surg Oncol, Hangzhou 310009, Zhejiang, Peoples R China
[2] Johns Hopkins Univ, Sol Goldman Pancreat Canc Ctr, Dept Oncol & Surg, Skip Viragh Ctr Pancreat Canc,Sch Med, Baltimore, MD 21231 USA
[3] Zhejiang Univ, Sch Med, Affiliated Hosp 2, Dept Pathol, Hangzhou 310009, Zheijang, Peoples R China
[4] Zhejiang Univ, Sch Med, Affiliated Hosp 2, Dept Gen Surg, Hangzhou 310009, Zheijang, Peoples R China