1. Retina Service, Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
2. Vitreo-Retinal Associates of Worcester, PC, Worcester, MA, USA
3. The Francis I. Proctor Foundation, UCSF School of Medicine, San Francisco, CA, USA
4. The Department of Ophthalmology, California Pacific Medical Center, San Francisco, CA, USA
5. The Department of Ophthalmology, Stanford University School of Medicine, Stanford, CA, USA