1. ENT Department, Medical Faculty; Eskisehir Osmangazi University; Eskisehir Turkey
2. Department of Chest Diseases, Medical Faculty; Celal Bayar University; Manisa Turkey
3. Faculty of Communication Sciences; Anadolu University; Eskisehir Turkey
4. Department of Chest Diseases, Medical Faculty; Gazi University; Ankara Turkey
5. ENT Department, Medical Faculty; Kırıkkale University; Kırıkkale Turkey
6. ENT Clinic, GOP Taksim Ilkyardım Training and Research Hospital; Istanbul Turkey
7. Anaesthesiology Clinic; Taksim Ilkyardım Training and Research Hospital; Istanbul Turkey
8. Department of Chest Diseases; Medical Faculty, Hacettepe University; Ankara Turkey
9. ENT Clinic, Haseki Training and Research Hospital; Istanbul Turkey
10. ENT Clinic, Trabzon Training and Research Hospital; Trabzon Turkey
11. ENT Clinic, Ekol ENT Hospital; İzmir Turkey