1. Department of Cardiovascular Surgery, Hacettepe University Faculty of Medicine, Ankara, Turkey
2. Recep Tayyip Erdogan University, Faculty of Medicine, Department of Cardiovascular Surgery, Islampasa Mah, 53100 Rize, Turkey
3. Department of Cardiovascular Surgery, Katip Çelebi University Faculty of Medicine, İzmir Atatürk Training and Research Hospital, İzmir, Turkey
4. Department of Cardiovascular Surgery, Ada Hospital, Giresun, Turkey