[1] Ohio State Univ, Wexner Med Ctr & James Comprehens Canc, Dept Surg Hlth Serv Management & Policy, Columbus, OH 43210 USA
[2] Ohio State Univ, Urban Meyerand Shelley Meyer Chair Canc Res Oncol, James Comprehens Canc Ctr, Oncol, Columbus, OH 43210 USA
[3] Univ Verona, Dept Surg, Verona, Italy
[4] Cleveland Clin Fdn, Digest Dis & Surg Inst, Dept Hepatopancreato biliary & Liver Transplant Su, Cleveland Hts, OH USA
[5] Curry Cabral Hosp, Dept Surg, Lisbon, Portugal
[6] Univ Sydney, Sch Med, Dept Surg, Sydney, Australia
[7] Emory Univ, Winship Canc Inst, Div Surg Oncol, Atlanta, GA USA
[8] Keio Univ, Dept Surg, Tokyo, Japan
[9] Yokohama City Univ, Sch Med, Yokohama, Japan