1. Department of Neurology and Neurosurgery, Montreal Neurological Institute and Hospital- McGill University, Montreal, Canada
2. Neurosurgery Department, Khoula Hospital, Muscat, Sultanate of Oman
3. Sultan Qaboos University, College of Medicine and Health Sciences, Muscat, Sultanate of Oman
4. Department of General Surgery, Sohar Hospital, Sohar, Sultanate of Oman