1. Department of Gastroenterology and Hepatology, Mayo Clinic, 200 1st St. SW, Rochester, MN 55905, USA
2. School of Medicine, American University of Beirut, Bliss St., Beirut P.O. Box 11-0236, Lebanon
3. Department of Nutrition, Saint Joseph University, Damascus St., Beirut P.O. Box 17-5208, Lebanon
4. Department of Internal Medicine, Indiana University, 1120 W Michigan St., Indianapolis, IN 46202, USA
5. Department of Surgery, Johns Hopkins School of Medicine, 1800 Orleans St., Baltimore, MD 21287, USA
6. Department of Anatomy, Cell Biology and Physiological Sciences, American University of Beirut, Bliss Street, Beirut P.O. Box 11-0236, Lebanon
7. Department of Medical Oncology, Dana Farber Cancer Institute, 450 Brookline Ave., Boston, MA 02215, USA
8. Division of Gastroenterology, Hepatology, and Nutrition, University of Pittsburgh, 200 Lothrop St., Pittsburgh, PA 15261, USA
9. Department of Gastroenterology and Hepatology, American University of Beirut Medical Center, Cairo Street, Beirut P.O. Box 11-0236, Lebanon
10. Division of Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, FL 32224, USA