1. Department of Otolaryngology, King Saud University, Riyadh, Saudi Arabia
2. Otolaryngology Department, College of Medicine, Al-Menoufiya University, Shebin Al-Koum, Egypt
3. Research Chair of Voice, Swallowing, and Communication Disorders, King Saud University
4. Department of Otolaryngology, Weill Cornell Medical College, New York, USA