1. Pediatric Ambulatory Center, Department of Family Medicine, Sackler School of Medicine, Tel Aviv University, Petach Tikvah, Israel
2. Infectious Disease Unit, Chaim Sheba, Tel Hashomer, Israel
3. Department of Family Medicine, Sackler School of Medicine, Tel Aviv University
4. Department of Pediatrics “C,” Schneider Chil-dren's Medical Center of Israel, Sackler School of Medicine, Tel Aviv University
5. Pediatric Ambulatory Center, Department of Family Medicine, Sackler School of Medicine, Tel Aviv University