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Charli Robinson 2012 4 18

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Positivity can protect from heart attack, stoke, study finds
A positive outlook may be good for your heart, Harvard researchers say.
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Charli Robinson 2012 4 18

Charli Robinson arrives for the 'Battleship' Australian Premiere at Luna Park on April 10, 2012 in Sydney, Australia.

Ryan Pierse
AFP/Getty Images