The prevalence and risk factors of retinal microvascular abnormalities in older persons: The Cardiovascular Health Study.
Wong TY, Klein R, Sharrett AR, Manolio TA, Hubbard LD, Marino EK, Kuller L, Burke G, Tracy RP, Polak JF, et al. Ophthalmology. 2003 Apr; 110(4):658-66.