RT Journal Article SR Electronic T1 Long-term aspirin use and neovascular age-related macular degeneration: association or causation? JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP e6 OP e6 DO 10.1136/eb-2013-101358 VO 19 IS 1 A1 William G Christen YR 2014 UL http://ebm.bmj.com/content/19/1/e6.abstract AB