1. Department of Pediatrics; Hadassah-Hebrew University Medical Center; Jerusalem Israel
2. Pediatric Pulmonology Unit; Hadassah-Hebrew University Medical Center; Jerusalem Israel
3. Pediatric Radiology Unit; Hadassah-Hebrew University Medical Center; Jerusalem Israel
4. Pediatric Infectious Disease Unit; Hadassah-Hebrew University Medical Center; Jerusalem Israel
5. Department of Pediatric Emergency Medicine; Shaare Zedek Medical Center; Jerusalem Israel
6. Pediatric Pulmonology Unit; Shaare Zedek Medical Center; Jerusalem Israel