Varma Rohit, Richman Elaine A, Ferris Frederick L, Bressler Neil M
Doheny Eye Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA.
Invest Ophthalmol Vis Sci. 2010 Dec;51(12):6095-103. doi: 10.1167/iovs.10-5627.