1. Hacettepe University Faculty of Medicine, Department of Pediatrics, Unit of Infectious Diseases, Ankara, Turkey
2. Van Yüzüncü Yıl University Faculty of Medicine, Department of Medical Microbiology, Van, Turkey
3. Van Yüzüncü Yıl University Faculty of Medicine, Department of Pediatrics, Van, Turkey
4. Hacettepe University Faculty of Medicine, Department of Pediatrics, Ankara, Turkey