1. Department of Internal Medicine, University of Atatürk, Erzurum, Turkey.
2. Department of Physiology, University of Atatürk, Erzurum, Turkey.
3. Department of Histology and Embryology, University of Atatürk, Erzurum, Turkey.
4. Department of Physiology, Faculty of Medicine, University of Atatürk, Erzurum, Turkey.
5. Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Atatürk, Erzurum, Turkey.