1. Otolaryngology - Head & Neck Surgery Department, College of Medicine, King Saud University, Riyadh, Saudi Arabia
2. Otolaryngology - Head & Neck Surgery Unit, Surgery Department, Security Forces Hospital Program, Riyadh, Saudi Arabia
3. Otolaryngology ‐ Head and Neck Surgery Department, Qatif Central Hospital, Qatif City, Saudi Arabia
4. Otolaryngology ‐ Head and Neck Surgery Department, Ad Diriyah Hospital, Riyadh, Saudi Arabia