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07/19/2013 02:37 pm ET

Researchers See Decline In Dementia, Offering Optimism For Power Of Lifestyle

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Two European studies show a significant decline in dementia and severe memory loss among healthier and better educated populations. Can successive generations continue to encourage this downward trend? Gwen Ifill talks to Dr. Murali Doraiswamy, a practicing physician and professor at Duke University School of Medicine.

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