1 University of Illinois, Department of Ophthalmology, Eye and Ear Infirmary ; Doheny Eye Institute, Department of Ophthalmology, University of Southern California Keck School of Medicine.
2 Doheny Eye Institute, Department of Ophthalmology, University of Southern California Keck School of Medicine.
3 Doheny Eye Institute, Department of Ophthalmology, University of Southern California Keck School of Medicine ; Retina Vitreous Associates, Los Angeles.