1. Department of Cardiovascular Surgery, Bingol State Hospital, Bingol, Turkey
2. Department of Cardiovascular Surgery, Balikesir University Faculty of Medicine, Balıkesir, Turkey
3. Department of Cardiovascular Surgery, Abant Izzet Baysal University Faculty of Medicine, Bolu, Turkey
4. Department of Cardiovascular Surgery, Elazig Education and Research Hospital, Elazig, Turkey