The following resources present additional information on insomnia: National Sleep Foundation: Can’t Sleep? What to Know About Insomnia http://www.sleepfoundation.org/article/sleep-related-problems/insomnia-and-sleep University of Maryland – Medical Center: Insomnia http://www.umm.edu/altmed/articles/insomnia-000096.htm U.S. National Library of Medicine – MedlinePlus: Insomnia http://www.nlm.nih.gov/medlineplus/ency/article/000805.htm
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