1. Neurosurgery, Imam Abdulrahman Bin Faisal University King Fahd Hospital of the University, Alkhobar, Saudi Arabia
2. Neurology and Neurosurgery, McGill University Faculty of Medicine, Montreal, Canada
3. Surgery, King Saud University, Riyadh, Saudi Arabia
4. Surgery, King Abdulaziz University, Jeddah, Saudi Arabia