1. * Medical Director of Radiology, King Saud University, Riyadh 11461, Saudi Arabia
2. † Assistant Professor of Neurosurgery, King Saud University, Riyadh 11461, Saudi Arabia
3. ‡ Professor of Pathology, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia
4. § Consultant Radiologist, King Khalid University Hospital, Riyadh 11472, Saudi Arabia