[1] Mem Sloan Kettering Canc Ctr, Dept Surg, Hepatopancreatobiliary Serv, 1275 York Ave, New York, NY 10021 USA
[2] Stanford Univ, Sch Med, Dept Surg, Stanford, CA 94305 USA
[3] Univ Miami, Miller Sch Med, Sylvester Comprehens Canc Ctr, Dept Surg, Miami, FL 33136 USA