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Washington University School of Medicine. (2013) Eurekalert. Sleep loss precedes Alzheimer's symptoms. Retrieved from http://www.eurekalert.org/pub_releases/2013-03/wuso-slp030813.php
MedlinePlus. (2013, May 20). Sleep Apnea in Seniors Tied to Alzheimer's in Study. Retrieved from http://www.nlm.nih.gov/medlineplus/news/fullstory_136994.html
Harvard Medical School (2006) Importance of Sleep : Six reasons not to scrimp on sleep. Retrieved from http://www.health.harvard.edu/press_releases/importance_of_sleep_and_health

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