1. Department of Otolaryngology, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
2. King Abdullah Ear Specialist Center, College of Medicine, King Saud University, Riyadh, Saudi Arabia
3. Department of Anatomy and Physiology, Imam Mohammed Ibn Saud Islamic University, Riyadh, Saudi Arabia
4. Communication and Swallowing Disorder Unit, King Abdulaziz University Hospital, King Saud University, Riyadh, Saudi Arabia