1. Department of General Surgery, Faculty of Medicine, Kırıkkale University, Kırıkkale, Turkey.
2. Department of Biochemistry, Istanbul University, Istanbul, Turkey.
3. Department of General Surgery, Hacettepe University, School of Medicine, Ankara, Turkey.
4. Department of General Surgery, Alaca State Hospital, Çorum, Turkey.
5. Department of Biochemistry, Bezmialem Vakif University Medical Faculty, Istanbul, Turkey.