1. Department of Psychiatry, Faculty of Medicine, Kafkas University, Kars, Turkey
2. Department of Psychiatry, Faculty of Medicine, Yildirim Beyazit University, Ankara, Turkey
3. Department of Biochemistry, Faculty of Medicine, Yildirim Beyazit University, Ankara, Turkey
4. Department of Cardiovascular Surgery, Faculty of Medicine, Kafkas University, Kars, Turkey