1. Retina Foundation of the Southwest, Dallas, TX, USA
2. Foundation Fighting Blindness, Columbia, MD, USA
3. Human Genetics Center, School of Public Health, University of Texas Health Science Center, Houston, TX, USA
4. Radboud University, Nijmegen, The Netherlands
5. Vitreoretinal Associates, Gainesville, FL, USA
6. University of Alberta, Edmonton, Canada
7. Casey Eye Institute, Oregon Health & Science University, Portland, OR, USA