1. Department of Otolaryngology Head and Neck Surgery Prince Sultan Military Medical City Riyadh Kingdom of Saudi Arabia
2. Department of Otolaryngology Head and Neck Surgery Collage of Medicine Qassim University Qassim Kingdom of Saudi Arabia
3. Division of Pediatric Otolaryngology Head and Neck Surgery Department of Otolaryngology Head and Neck Surgery Prince Sultan Military Medical City Riyadh Kingdom of Saudi Arabia