1. Pediatric Division, Soroka University Medical Center, Beer-Sheva 8410101, Israel
2. Clinical Research Center, Soroka University Medical Center, Ben-Gurion University of the Negev, Beer-Sheva 8410101, Israel
3. Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
4. Pediatric Dermatology Service, Soroka University Medical Center, Yitzhak Rager Ave., P.O. Box 151, Beer-Sheva 8410101, Israel