1. Department of Otolaryngology and Head and Neck Surgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia
2. Department of Otolaryngology, Head and Neck Surgery, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
3. Department of Otolaryngology, Head and Neck Surgery, College of Medicine, Umm-al-Qura University, Makkah, Saudi Arabia
4. Department of Otolaryngology, Head and Neck Surgery, Umm Al-Qura University, and Al-Noor Specialist Hospital, Makkah, Saudi Arabia