1. Departments of Pediatrics Faculty of Medicine Kırıkkale University KırıkkaleTurkey
2. Department of ENT Faculty of Medicine Kırıkkale University KırıkkaleTurkey
3. ENT Clinics Kırıkkale Yüksek İhtisas Hospital KırıkkaleTurkey
4. Department of Medical Biochemistry Atatürk Training and Research Hospital Ankara Yıldırım Beyazıt University Ankara Turkey