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Has any research included data on longevity in the reported incidence of PD? If late onset PD is prevalent in the USA due to increased longevity, then shorter longevity may skew the stats toward fewer cases of PD/100,000 population. Wayne 71 CG Nancy 74/22+ ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn