1. Department of Surgery; School of Medical Sciences, Kwame Nkrumah University of Science and Technology, University Hospital, KNUST; Kumasi Ghana
2. Department of Surgery; University of Washington; Seattle Washington
3. Directorate of Surgery; Komfo Anokye Teaching Hospital; Kumasi Ghana
4. New York University School of Medicine; New York City New York
5. Division of Hepatopancreatobiliary Surgery; Department of Surgery; Memorial Sloan-Kettering Hospital; New York City New York