The prevalence and incidence of Parkinson's disease.
D000367:Age Factors; D000368:Aged; D004812:Epidemiologic Methods; D005843:Geography; D006801:Humans; D010300:Parkinson Disease / Q000175:diagnosis / Q000453:epidemiology*; D010301:Parkinson Disease, Postencephalitic / Q000453:epidemiology; D012494:Sampling Studies; D014481:United States