1. College of Optometry; Rocky Mountain University of Health Professions; Provo Utah USA
2. Academic Ophthalmology; School of Medicine, University of Nottingham; Nottingham, NG7 2RD UK
3. Department of Ophthalmology; Queen's Medical Centre; Nottingham UK
4. Department of Ophthalmology; University of Colorado, Anschutz Medical Campus; Aurora Colorado USA
5. Department of Clinical Sciences; University of Houston, College of Optometry; Houston Texas USA
6. Wilmer Eye Institute; Johns Hopkins University School of Medicine; Baltimore Maryland USA