References for "Why coffee perks people up"

Published: March, 2012

Lucas M, et al. "Coffee, Caffeine, and Risk of Depression Among Women," Archives of Internal Medicine (Sept. 26, 2011): Vol. 171, No. 17, pp. 1571–78.

Tanskanen A, et al. "Heavy Coffee Drinking and the Risk of Suicide," European Journal of Epidemiology (Sept. 2000): Vol.16, No. 9, pp. 789–91.

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