1. Department of Neurosurgery, King Saud University, Riyadh, Saudi Arabia
2. Department of Surgery, Division of Neurosurgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia
3. Department of Radiology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
4. Otolaryngology–Head and Neck Surgery Department, King Abdulaziz University Hospital, King Saud University, Riyadh, Saudi Arabia
5. Department of Neurosurgery, Stanford School of Medicine, Palo Alto, California, United States