1. Department of Epidemiology and Preventive Medicine, School of Public Health, Sackler Faculty of Medicine; Tel Aviv University; Tel Aviv Israel
2. Research Division, Epidemiology Service; Assuta Medical Centers; Tel Aviv Israel
3. Faculty of Health Sciences; Ben-Gurion University of the Negev; Beer-Sheva Israel
4. Department of Gastroenterology and Liver Diseases; Tel-Aviv Sourasky Medical Center; affiliated to the Sackler Faculty of Medicine; Tel Aviv Israel
5. Internal Medicine “C”, “D” and “E”, the Tel Aviv Sourasky Medical Center, affiliated to the Sackler Faculty of Medicine; Tel Aviv University; Tel-Aviv Israel