1. College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Jeddah, Saudi Arabia
2. King Abdullah International Medical Research Center, Jeddah, Saudi Arabia
3. Department of Neurosurgery, King Fahad General Hospital, Ministry of Health, Jeddah, Saudi Arabia
4. Department of Pathology and Laboratory Medicine, King Abdulaziz Medical City, National Guard Health Affairs, Jeddah, Saudi Arabia.