1. College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia,
2. King Abdullah International Medical Research Center, Riyadh, Saudi Arabia,
3. Division of Neurosurgery, Department of Surgery, Ministry of National Guard - Health Affairs, Riyadh, Saudi Arabia,
4. University of Miami, Department of Neurological Surgery, Miami, FL. USA,
5. Department of Neurosurgery, Prince Sultan Military Medical City, Riyadh, Arabia,
6. Prince Mohammed Medical City, Jouf, Saudi Arabia,
7. Faculty of Applied Medical Sciences, Jazan University, Jazan, Saudi Arabia,
8. National Center for Evidence Based Healthcare, Saudi Health Council, Riyadh, Saudi Arabia.