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Optimism is associated with exceptional longevity in 2 Epidemiologic cohorts of men and women #DontWorryBeHappy Bobby McFerrin - Don't Worry Be Happy https://t.co/yUKbkEG1yd https://t.co/0gLuhJ366Y https://t.co/lMLORXqsWS #DONews 09-01-2019
