1. Medical Faculty, Department of Histology and Embryology, Ankara Yıldırım Beyazıt University, Ankara, Turkey
2. Department of Pathology, Faculty of Veterinary Medicine, Afyon Kocatepe University, Afyon, Turkey
3. Department of Histology and Embryology, Medical Faculty, Ankara Yıldırım Beyazıt University, Ankara, Turkey