title: The incremental nature of clinical research: comment on "The association of aspirin use with age-related macular degeneration".
authors: Kenneth E
authors: KE
authors: Covinsky
mesh_terms: D001241:Aspirin / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008268:Macular Degeneration / Q000209:etiology*; D008297:Male
chemical_list: D001241:Aspirin