Markers of inflammation, oxidative stress, and endothelial dysfunction and the 20-year cumulative incidence of early age-related macular degeneration: the Beaver Dam Eye Study. - Klein R; Myers CE; Cruickshanks KJ; Gangnon RE; Danforth LG; Sivakumaran TA; Iyengar SK; Tsai MY; Klein BE (JAMA ophthalmology, 2014)