1. Department of Cardiology, Ardahan State Hospital, 75000, Ardahan, Turkey
2. Department of Cardiology, Kars Harakani State Hospital, 36200, Kars, Turkey
3. Department of Cardiology, Bayrampasa State Hospital, 34040, Istanbul, Turkey
4. Department of Cardiology, Dr Siyami Ersek Thoracic & Cardiovascular Surgery Training Hospital, 34668, Istanbul, Turkey
5. Department of Medicine, University of Maryland Medical Center Midtown Campus, MD 21201, USA