1. Department of Public Health Sciences, University of Miami Miller School of Medicine, Miami, Florida
2. Dana Center for Preventive Ophthalmology, Wilmer Eye Institute, the Johns Hopkins University School of Medicine, Baltimore, Maryland
3. Department of Human Development and Family Studies, Purdue University, West Lafayette, Indiana
4. Department of Statistics, Purdue University, West Lafayette, Indiana
5. Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, Florida