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Continued: Breast cancer among young women shows small surge

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  • Last update: March 2, 2013 - 5:58 PM

Blood samples taken from patients revealed genetic changes that, with further research, may help answer why sleepless nights are so harmful to health, according to the study published in the Proceedings of the National Academy of Sciences. While not all of the altered genes have known functions, some are involved in metabolism and stress response.

More than one-third of Americans sleep fewer than seven hours a night, affecting their ability to concentrate, according to the U.S. Centers for Disease Control and Prevention.

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  • Dr. Rebecca Johnson, lead author of the breast cancer study, says the increase likely has more than one cause.

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