1. University of Southern California Roski Eye Institute, Keck School of Medicine, Los Angeles, CA, USA
2. Wills Eye Hospital/Mid-Atlantic Retina, Philadelphia, PA, USA
3. Duke Eye Center, Duke University Medical School, Durham, NC, USA
4. Retina Center of Minnesota, Minneapolis, MN, USA
5. West Coast Retina Medical Group, San Francisco, CA, USA
6. Tennessee Retina, PC, Nashville, TN, USA