1. The Ohio State University Wexner Medical Center, Columbus
2. University of Verona, Verona, Italy
3. Fundeni Clinical Institute, Bucharest, Romania
4. Curry Cabral Hospital, Lisbon, Portugal
5. Ospedale San Raffaele, Milan, Italy
6. Emory University, Atlanta, Georgia
7. University of Sydney, Sydney, Australia
8. Johns Hopkins Hospital, Baltimore, Maryland
9. University of Virginia, Charlottesville, Virginia
10. Eastern Hepatobiliary Surgery Hospital, Shanghai, China
11. Stanford University, Stanford, California
12. Beaujon Hospital, Clichy, France
13. University of Ottawa, Ontario, Canada
14. Erasmus University Medical Center, Rotterdam, the Netherlands
15. Yokohama City University, Yokohama, Japan