1. Department of Neurosurgery, King Abdulaziz Medical City, National Guard Health Affairs, Jeddah, Saudi Arabia
2. King Abdullah International Medical Research Center, Jeddah, Saudi Arabia
3. College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Jeddah, Saudi Arabia
4. Neurosurgery Department, King Abdullah Medical City in Holy Capital, Saudi Arabia.