1. College of Medicine, Taif University, Taif, Saudi Arabia
2. College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
3. Department of Neurosurgery, King Saud University Medical City/King Khalid University Hospital, Riyadh, Saudi Arabia
4. Department of Pathology and Laboratory Medicine, King Abdulaziz Medical City, King Saud bin Abdulaziz University for Health Sciences, King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
5. Department of Neurosurgery, King Abdualziz Medical City, Riyadh, Saudi Arabia