1. Neurosurgery Department, Koç University School of Medicine, Rumelifeneri Yolu Sarıyer, 34450 Istanbul, Turkey
2. Neurosurgery Department, Necmettin Erbakan University Meram Medical Faculty Hospital, 42080 Konya, Turkey
3. Neurosurgery Department, American Hospital, 34365 Istanbul, Turkey
4. Physical Therapy and Rehabilitation Department, American Hospital, 34365 Istanbul, Turkey
5. Neurosurgery Department, Mengücek Gazi Training and Research Hospital, School of Medicine, Erzincan University, 24100 Erzincan, Turkey