1. Department of Hepatobiliary Surgery and Institute of Advanced Surgical Technology and Engineering; The First Affiliated Hospital of Xi'an Jiaotong University; Xi'an China
2. Department of Surgery; The Ohio State University Wexner Medical Center; Columbus Ohio
3. Department of Surgery; Johns Hopkins Hospital; Baltimore Maryland
4. Department of Surgery, Scientific Institute San Raffaele; Vita-Salute San Raffaele University; Milan Italy
5. Department of Surgery; Stanford University; Stanford California
6. Department of Surgery; University of Virginia; Charlottesville Virginia
7. Department of Surgery; Washington University; School of Medicine; St Louis Missouri
8. Department of Surgery; Emory University; Atlanta Georgia
9. Department of Surgery; Curry Cabral Hospital; Lisbon Portugal