1. Department of Pediatric Pulmonology, Gazi University Faculty of Medicine, Ankara, Turkey
2. Department of Pediatric Pulmonology, Dr Sami Ulus Maternity and Children Research and Training Hospital, 06080 Ankara, Turkey
3. Department of Pediatric Infectious Disease, Gazi University Faculty of Medicine, Ankara, Turkey
4. Department of Radiology, Gazi University Faculty of Medicine, Ankara, Turkey
5. Department of Medical Education, Gazi University Medicine Faculty, Ankara, Turkey