The study found that more than one-third of the pictures in women's magazines showed babies in unsafe sleep positions.

VOA: special.2009.08.26

For the study,they aimed for at least ten hours of sleep each night during the season.

VOA: special.2010.06.09

New technologies have made the study of sleep cheaper, easier, and less intrusive.

NEWYORKER: Up All Night

I'd get seven hours of shut-eye a night because a six-year, large-scale population study of sleep done at the University of California, San Diego School of Medicine associated it with the lowest death rate among adults.

CNN: Healthy habits: A month of living perfectly

He points out that of 521 patients who took the drug in a safety study, 2 had forms of sleep paralysis, which can be a symptom of narcolepsy.

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