1. Department of Neurosurgery, Çanakkale Onsekiz Mart University, Faculty of Medicine, Çanakkale, Turkey.
2. Department of Cardiovascular Surgery, Çanakkale Onsekiz Mart University, Faculty of Medicine, Çanakkale, Turkey.
3. Department of Medical Biochemistry, Çanakkale Onsekiz Mart University, Faculty of Medicine, Çanakkale, Turkey.
4. Department of Histology and Embryology, Afyon Kocatepe University, Faculty of Medicine, Afyon, Turkey.