1. Department of Cardiology, School of Medicine, Kafkas University, Kars, Turkey.
2. Department of Cardiology, Yenimahalle State Hospital, Ankara, Turkey.
3. Department of Cardiology, Adana Numune Training and Research Hospital, Adana, Turkey.
4. Department of Cardiology, School of Medicine, Dicle University, Diyarbakır, Turkey.