1. Department of Otolaryngology Head and Neck Surgery, Prince Sultan Military Medical City , Riyadh 11159 , Saudi Arabia
2. Department of Otolaryngology Head and Neck Surgery, King Saud University Medical City , Riyadh 11564 , Saudi Arabia
3. Department of Otolaryngology Head and Neck Surgery, College of Medicine, Qassim University , Qassim, Buraydah 52375 , Saudi Arabia
4. Division of Pediatric Otolaryngology, Prince Sultan Military Medical City , Riyadh 11159 , Saudi Arabia