1. Department of Surgery, Ankara Numune Teaching and Research Hospital, Ankara, Turkey.
2. Department of Nutrition and Dietetics, Hacettepe University, Ankara, Turkey.
3. Department of Surgery, Abant IB University Hospital, Bolu, Turkey.
4. Department of Pathology, Mersin University Hospital, Mersin, Turkey.
5. Department of Anesthesiology, Mersin University Hospital, Mersin, Turkey.