1. Department of Otolaryngology-Head and Neck-Facial Plastic Surgery, King Abdulaziz University Hospital
2. Department of Otorhinolaryngology and Head and Neck Surgery
3. Department of Otolaryngology-Head and Neck Surgery, College of Medicine, King Fahad Hospital of the University, Al-Khobar, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
4. Department of Otorhinolaryngology-Head and Neck, College of Medicine, King Saud University, Riyadh