1. Department of Radiology & Medical Imaging, King Saud University Medical City, Riyadh, Kingdom of Saudi Arabia;
2. Department of Neurosurgery, Prince Sultan Military Medical City, Riyadh, Kingdom of Saudi Arabia;
3. Division of Neurosurgery, Department of Surgery, College of Medicine, King Saud University, Riyadh, Kingdom of Saudi Arabia;
4. Otolaryngology–Head & Neck Surgery Department, College of Medicine, King Saud University, Riyadh, Kingdom of Saudi Arabia