1. Department of Cardiovascular Surgery, Bursa State Hospital, Bursa, Turkey
2. Department of Cardiovascular Surgery, Balıkesir 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, Bursa Yıldırım Doruk Hospital, Bursa, Turkey