1. Byers Eye Institute, Stanford University, Palo Alto, California
2. Medical student, University of Michigan Medical School, Ann Arbor
3. Department of Ophthalmology and Visual Sciences, W. K. Kellogg Eye Center, University of Michigan, Ann Arbor
4. Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor
5. Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor