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(MedPage Today) -- Physicians in the Twitterverse may want to start paying attention to their Klout score, which measures a person’s influence on various social media outlets.

WASHINGTON (MedPage Today) -- The National Institutes of Health unveiled its new Alzheimer's prevention plan, and an FDA panel endorsed the first-ever entirely at-home HIV test.

(MedPage Today) -- Rats fed a sugary diet forgot how to run a maze they had previously mastered, but the effect was countered by omega-3 fatty acid supplements.

(MedPage Today) -- Having the results of a personalized genetic test did not drive patients to utilize potentially costly follow-up healthcare services, a study from the National Institutes of Health (NIH) found.

(MedPage Today) -- This week's topics include stress testing after heart procedures, coffee and mortality, air pollution and markers of inflammation, and laxative-free colonoscopy.