1. Division of Otolaryngology-Head and Neck Surgery , Department of Surgery, Ministry of National Guard Health Affairs, , Riyadh 12221, Saudi Arabia
2. King Abdullah International Medical Research Center , Department of Surgery, Ministry of National Guard Health Affairs, , Riyadh 12221, Saudi Arabia
3. Division of Otolaryngology Head & Neck Surgery, King Abdulaziz Medical City , Riyadh 12221, Saudi Arabia
4. Department of Pathology and Laboratory Medicine, King Abdulaziz Medical City , Riyadh 12221, Saudi Arabia