1. Department of Otolaryngology—Head & Neck Surgery, Dr. Soliman Fakeeh Hospital , Jeddah, Saudi Arabia
2. Department of Otolaryngology—Head & Neck Surgery, King Fahad General Hospital , Jeddah, Saudi Arabia
3. Department of Otolaryngology—Head & Neck Surgery, King Faisal Specialist Hospital and Research Center , Jeddah, Saudi Arabia
4. Department of Otolaryngology—Head & Neck Surgery, Umm Al-Qura University , Makkah, Saudi Arabia