1 Hacettepe University School of Medicine, 06100, Ankara, Turkey.
2 Adnan Menderes University School of Medicine, 09100, Aydın, Turkey.
3 Department of Neurosurgery, Adnan Menderes University School of Medicine, Cumhuriyet Mahallesi, Adnan Menderes Bulvarı, Haltur Apartmanı No: 6/7, 09020, Aydın, Turkey. drmturgut@yahoo.com.