1. Department of Surgery, University of Washington, Seattle, Washington, USA
2. Department of Hepatobiliary and Pancreatic Surgery and Liver Transplantation, St Stephen's Hospital, Delhi, India
3. Department of Surgery, Columbia University College of Physicians and Surgeons, New York, USA
4. Department of Surgery, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
5. Department of Surgery, Medical University of Graz, Graz, Austria
6. Department of Surgery, Hospital Angeles Lomas, Mexico City, Mexico