| http://www.w3.org/ns/prov#value | - Lack of sleep was associated with increased leptin levels and decreasing ghrelin -- changes that were more likely a consequence, rather than a cause, of over-eating.Sleep deprivation is a growing problem, with 28 percent of adults now reporting that they get six or fewer hours of sleep per night, said Andrew D. Calvin, M.D., M.P.H., co-investigator, cardiology fellow and assistant professor of m
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