1. Wake Forest School of Medicine, Winston-Salem, NC, USA
2. Northwestern University Feinberg School of Medicine, Chicago, IL, USA
3. National Eye Institute of the National Institutes of Health, Bethesda, MD, USA
4. Emory University Rollins School of Public Health, Atlanta, GA, USA
5. University of California, San Francisco, San Francisco, CA, USA
6. Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA