Assuta Medical Center, Tel Aviv, Israel; Department of Gastroenterology, Tel-Aviv Medical Center, Tel-Aviv, Israel; Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel. Electronic address: shirisherf@gmail.com. Department of Gastroenterology, Tel-Aviv Medical Center, Tel-Aviv, Israel; School of Public Health, Faculty of Social Welfare and Health Sciences, University of Haifa, Haifa, Israel. Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel; Department of Surgery, Rabin Medical Center, Campus Beilinson, Petach Tiqva, Israel. Assuta Medical Center, Tel Aviv, Israel. Department of Gastroenterology, Tel-Aviv Medical Center, Tel-Aviv, Israel; Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.