1. Department of Cardiology, Ordu State Hospital, 52200 Ordu, Turkey
2. Department of Cardiology, Ordu University Hospital, 52200 Ordu, Turkey
3. Department of Cardiology, Giresun University Hospital, 28200 Giresun, Turkey
4. Department of Cardiovascular Surgery, Giresun University Hospital, 28200 Giresun, Turkey