title: Unidentified risk factor?
mesh_terms: D000368:Aged; D002561:Cerebrovascular Disorders / Q000139:chemically induced*; D003300:Copper / Q000009:adverse effects*; D006801:Humans; D008669:Metallurgy; D008875:Middle Aged; D009784:Occupational Diseases / Q000139:chemically induced*; D012306:Risk
chemical_list: D003300:Copper