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Journal of Experimental Psychology: Human Perception and Performance.
Archives of Internal Medicine.
National Sleep Foundation.
Journal of Epidemiology and Community Health.
Journal of Clinical Oncology.
New England Journal of Medicine.
American Journal Of Preventive Medicine.
Curr Sports Med.
University of Texas Health Science Center at Houston
Case Center for Collegiate Behavioral Health.
Motivation and Emotion.
University of Maryland Health Center.
Touch Research Institute.
American Heart Association.
Washington State Department of Health.
Rush University Medical Center.
Brown, Stuart. Play: How It Shapes the Brain, Opens the Imagination, and Invigorates the Soul. New York: Penguin, 2009.
National Wildlife Federation.
North Carolina Department of Health and Human Services.
University of Illinois Extension.
Harvard Business School Working Knowledge.
Medicine & Science in Sports & Exercise.
CDC: "Skin Cancer Prevention."
American Psychological Association.
American Academy of Sleep Medicine.
Reviewed by Amy Flowers, DVM on February 02, 2016
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THIS TOOL DOES NOT PROVIDE VETERINARY ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional veterinary advice, diagnosis or treatment and should not be relied on to make decisions about your pet’s health. Never ignore professional veterinary advice in seeking treatment because of something you have read on the WebMD Site. If you think your pet may have a veterinary emergency, immediately call your veterinarian.
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