[1] Johns Hopkins Univ, Dept Surg, Baltimore, MD 21287 USA
[2] Ohio State Univ, Dept Surg, Wexner Med Ctr, Div Surg Oncol, Columbus, OH 43210 USA
[3] Mayo Clin, Div Hepatobiliary & Pancreas Surg, Rochester, MN USA
[4] Univ Texas MD Anderson Canc Ctr, Dept Surg Oncol, Houston, TX 77030 USA
[5] Morsani Coll Med, Moffitt Canc Ctr, Dept Gastrointestinal Oncol, Dept Oncol Sci, Tampa, FL USA
[6] Univ Calif San Diego, Dept Surg, Div Surg Oncol, San Diego, CA 92103 USA
[7] Med Coll Wisconsin, Dept Surg, Div Surg Oncol, 8700 W Wisconsin Ave, Milwaukee, WI 53226 USA
[8] Univ Cincinnati, Coll Med, Dept Surg, Cincinnati, OH USA
[9] Univ Massachusetts, Sch Med, Dept Surg, Div Surg Oncol, Worcester, MA USA
[10] Univ Wisconsin, Dept Surg, Div Surg Oncol, Madison, WI USA
[11] City Hope Natl Med Ctr, Dept Surg, Div Surg Oncol, 1500 E Duarte Rd, Duarte, CA 91010 USA
[12] Emory Univ, Winship Canc Inst, Div Surg Oncol, Atlanta, GA 30322 USA
[13] Johns Hopkins Univ, Dept Med, Baltimore, MD USA
[14] Bloomberg Sch Publ Hlth, Dept Biostat & Epidemiol, Baltimore, MD USA