1. Wilmer Eye Institute, Dana Center for Preventive Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
2. Massachusetts Eye and Ear Infirmary, Glaucoma Center of Excellence, Harvard Medical School, Boston, Massachusetts, USA
3. School of Education, Johns Hopkins University, Baltimore, Maryland, USA
4. San Francisco School of Medicine, University of California, San Francisco, California, USA
5. Berman Institute of Bioethics, Johns Hopkins University, Baltimore, Maryland, USA