1. Deparment of Cardiology, Şişli Hamidiye Etfal Training and Research Hospital, İstanbul, Turkey
2. Deparment of Cardiology, Aksaray State Hospital, Aksaray, Turkey
3. Deparment of Cardiology, Samsun Training and Research Hospital, Samsun, Turkey
4. Deparment of Cardiology, University of California, Los Angeles, CA, USA
5. Deparment of Cardiology, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey