1. Department of Anesthesiology and Reanimation, Medical Faculty, Ataturk University, Palandoken, 25140 Erzurum, Turkey
2. Department of Anesthesiology and Reanimation, Erzurum Education Hospital, Palandoken, 25070 Erzurum, Turkey
3. Department of Anesthesiology and Reanimation, Sakarya Education Hospita, Korucuk Mah., 54290 Adapazari, Turkey