1. University of Maryland, Baltimore, MD, USA
2. Sollay Kenyan Foundation, Katani Hospital, Katani, Kenya
3. Schepens Eye Research Institute of Massachusetts Eye & Ear, Boston, MA, USA
4. Harvard Medical School, Boston, MA, USA
5. Anne Arundel Medical Center, Annapolis, MD, USA
6. Hartford Health Care Medical Group, Weatogue, CT, USA