1. Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, Maryland
2. Johns Hopkins Disability Health Research Center, Johns Hopkins University, Baltimore, Maryland
3. Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor
4. Institute for Social Research, University of Michigan, Ann Arbor
5. Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor
6. Johns Hopkins School of Nursing, Baltimore, Maryland