1. Department of Cardiovascular Surgery, Atatürk University Medical Faculty, Erzurum, Turkey.
2. Department of Cardiovascular Surgery, Yüksek Ihtisas Hospital, Bursa, Turkey.
3. Department of Cardiovascular Surgery, Afyon Kocatepe University Medical Faculty, Afyon, Turkey.
4. Department of Biochemistry, Atatürk University Medical Faculty, Erzurum, Turkey.
5. Department of Pathology, Medical Faculty of Atatürk University, Erzurum, Turkey.