1. Cochlear Center for Hearing and Public Health, Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
2. The Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland, USA
3. Department of Ophthalmology, Louisiana State University Health Sciences Center – New Orleans, New Orleans, Louisiana, USA
4. Department of Ophthalmology, American University of Beirut, Beirut, Lebanon
5. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
6. The wilmer eye institute, The Disability Health Research Center, Johns Hopkins Bloomberg University, Baltimore, Maryland, USA
7. Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University, Baltimore, Maryland, USA