1. King Abdullah Ear Specialist Center (KAESC), College of Medicine, King Saud University, Riyadh, Saudi Arabia
2. Department of Otolaryngology, King Fahad Medical City (KFMC), Riyadh, Saudi Arabia
3. Department of Otolaryngology, Head and Neck Surgery, King Abdulaziz University Hospital, Riyadh, Saudi Arabia
4. Division of Anatomical Pathology, Department of Laboratory Medicine, King Fahad Medical City (KFMC), Riyadh, Saudi Arabia
5. Department of Otorhinolaryngology and Head & Neck Surgery, Main Hospital, King Fahad Medical City (KFMC), Riyadh, Saudi Arabia