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Participants making a full smile performed better than the polite-smile group, but the difference wasn't statistically significant and needs to be studied further, she says.
WSJ: Stress-Busting Smiles
Some experts believe only a genuine, full smile, confers health benefits.
If you arrive to an already full room, enter slowly, smile and stand tall at the front.
FORBES: Mastering the Cocktail Party in 25 Steps
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