1. Sultan Qaboos University College of Medicine, Sultanate of Oman-Muscat, Al-Khoudh, Oman
2. Neurosurgery Department, Khoula Hospital, Muscat, Oman
3. Department of Ophthalmology, Al-Buraimi Hospital, Ministry of Health, Sultanate of Oman, Oman
4. Department of Neurology and Neurosurgery, Montreal Neurological Institute, Faculty of Medicine, McGill University, Quebec, Canada