1. Faculty of Medicine, University of Tabuk, Tabuk, Saudi Arabia
2. College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Sultanate of Oman
3. Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
4. College of Medicine and Health Sciences, National University of Sciences and Technology, Suhar, Sultanate of Oman
5. Department of Neurology & Neurosurgery, Montreal Neurological Institute, Faculty of Medicine, McGill University, Montreal, QC, Canada
6. Department of Neurosurgery, Khoula Hospital, Muscat, Sultanate of Oman