1. The Institute of Gastroenterology and Hepatology, Soroka University Medical Center and the Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
2. Medical School for International Health, Ben-Gurion University of the Negev, Beer-Sheva, Israel
3. Clalit Health Services, Beer-Sheva, Israel
4. Erasmus MC, Rotterdam, The Netherlands