title: Early onset Parkinson's disease and childhood environment.
mesh_terms: D000328:Adult; D000368:Aged; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D010300:Parkinson Disease / Q000209:etiology*; D012306:Risk; D012424:Rural Population; D012525:Saskatchewan; D012931:Social Environment; D014505:Urban Population