1. Department of Otolaryngology-Head and Neck Surgery, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States
2. Department of Otolaryngology-Head and Neck Surgery, Alexandria University, El Azareeta, Alexandria, Egypt
3. Department of Otolaryngology, Alexandria Medical School, Ramel Station, Alexandria, Egypt
4. Department of Otolaryngology-Head and Neck Surgery, Georgia Regents Medical Center, Augusta, Georgia, United States
5. Department of Neurosurgery, The University of Ohio, Columbus, Ohio, United States