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Sunday, July 5, 2009
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SAD Quiz: Test Your Knowledge

Do your moods and energy level change with the seasons" Just about everything on the planet, human or animal, moves to a circadian rhythm, but some are affected more strongly than others. Take this quiz and find out how much you know about Seasonal Affective Disorder.

By Deborah Gray

On average, what percentage of the U.S. population suffers from Seasonal Affective Disorder
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