1. Department of Cardiology, Yuzuncu Yil University Medical Faculty, Van, Turkey.
2. Department of Cardiology, Rize Kackar Government Hospital, Rize, Turkey.
3. Department of Pulmonary Diseas, Yuzuncu Yil University Medical Faculty, Van, Turkey.
4. Department of Cardiology, Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Education and Training Hospital, Istanbul, Turkey.
5. Department of Cardiology, Samsun Education and Training Hospital, Samsun, Turkey.