1. Brain and Spinal Cord Injuries Repair Research Center (BASIR), Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran.
2. Department of Neurological Surgery, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran.
3. Department of Otolaryngology, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran.
4. Department of Pathology, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran.