1. Keck School of Medicine at the University of Southern California, Los Angeles, California, U.S.A.
2. Department of Ophthalmology, USC Roski Eye Institute, Keck School of Medicine at the University of Southern California, Los Angeles, California, U.S.A.
3. Department of Radiology, Keck School of Medicine at the University of Southern California, Los Angeles, California, U.S.A.
4. Department of Medicine, Keck School of Medicine at the University of Southern California, Los Angeles, California, U.S.A.