1. Department of Neurosurgery, Bezmialem Vakif University, İstanbul, Turkey;
2. Department of Radiology, Uşak University, Uşak, Turkey;
3. Department of Radiology, Ağrı State Hospital, Ağrı, Turkey;
4. Department of Obstetrics and Gynecology, Dr. Turgut Noyan Research Center, Başkent University, Adana, Turkey;
5. Department of Neurosurgery, Bahçelievler State Hospital, İstanbul, Turkey;
6. Deparrment of Neurosurgery, Medeniyet University, Göztepe Training and Research Hospital, İstanbul, Turkey;
7. Department of Neurosurgery, University of Health Sciences, Sisli Hamidiye Etfal Training and Research Hospital, İstanbul, Turkey;
8. Department of Neurosurgery, Selahaddin Eyyübi State Hospital, Diyarbakır, Turkey;
9. Department of Biostatistics and Medical Informatics, Beykent University, İstanbul, Turkey;
10. Department of Neurosurgery, School of Medicine, Koç University, İstanbul, Turkey