1. W.K. Kellogg Eye Center, Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor
2. Center for Eye Policy and Innovation, University of Michigan, Ann Arbor
3. Department of Health Management and Policy, University of Michigan School of Public Health, Ann Arbor
4. NIHR Biomedical Research Centre, Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology, London, United Kingdom