1. Departments of Histology and Embryology, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey
2. Department of Histology and Embryology, Faculty of Medicine, İstanbul Medipol University, İstanbul, Turkey
3. Departments of Neurosurgery, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey
4. Faculty of Medicine, National University, Khartoum, Sudan
5. Nelson Mandela African Institute of Science and Technology, Arusha, Tanzania