1. Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
2. Department of Neurology, King Abdulaziz University, Jeddah, Saudi Arabia
3. Department of Surgery, King Abdulaziz University, Jeddah, Saudi Arabia
4. Department of Otolaryngology – Head and Neck Surgery, King Abdulaziz University, Jeddah, Saudi Arabia