1. Departments of Anaesthesiology and Reanimation, and Otorhinolaryngology, Medical Faculty, Ataturk University, Erzurum and Department of Anaesthesiology and Reanimation Erdncan State Hospital, Erzincan, Turkey
2. Department of Anaesthesiology and Reanimation, Medical Faculty, Ataturk University.
3. Department of Otorhinolaryngology.
4. Department of Anaesthesiology and Reanimation, Ercincan State Hospital.
5. Department of Otorhinolaryngology, Medical Faculty, Ataturk University.