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Check out this article in today's Washington Post health section about how chronic sleep deprivation (less than 6 hours a night for a week) actually changes genetic activity. Could this be why poor sleep is associated with higher risks of heart disease, stroke, diabetes and obesity? Warning - just reading the article could make you sleepy! Peninsula Regional has a sleep disorder clinic,  Peninsula Sleep Waves - it provides overnight sleep studies for adults and children. Visit to learn more.