1. Department of Otorhinolaryngology and Head and Neck Surgery, American University of Beirut, Beirut, Lebanon
2. Department of Medical Audiology, American University of Beirut, Beirut, Lebanon
3. Canadian International Scientific Exchange Program, Canada
4. Department of Clinical Epidemiology, Aarhus University, Aarhus, Denmark
5. Department of Otorhinolaryngology and Head and Neck Surgery, Clemenceau Medical Center, Beirut, Lebanon