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  • American Pet Products Association. "Industry Statistics and Trends." 2008. (May 5, 2009)http://americanpetproducts.org/press_industrytrends.asp
  • Cosgrove, Christine. "Owning a pet can be beneficial to your health." WebMD. 2000. (May 4, 2009)http://www.webmd.com/balance/features/pet-doctor?page=2
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  • Duncan, Susan L. "Loneliness: A Health Hazard of Modern Times." Interactions. 1995. (May 4, 2009)http://www.deltasociety.org/Document.Doc?id=116
  • Grimshaw, Heather. "A Four-Legged Cure." Thrive. July 2008. (May 4, 2009)http://www.nyc-plus.com/nyc38/afourleggedcure.html
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  • Harvard Medical School. "Dolphins for the doldrums?" Harvard Men's Health Watch. April 2006.
  • Howie, Ann R. "The Presence of Pets in Young Families Experiencing Cancer." Interactions. 1995.http://www.deltasociety.org/Document.Doc?id=118
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  • Lynch, James. "Developing a Physiology of Inclusion: Recognizing the Health Benefits of Animal Companions." Delta Society.http://www.deltasociety.org/Document.Doc?id=114
  • McNicholas, J. and G.M. Collis. "Children's representations of pets in their social networks." Child Care, Health and Development. Volume 27 Issue 3, p279-294. May 2001.
  • National Institutes of Health. "The Health Benefits of Pets." Sept. 10, 1987. (May 4, 2009)http://consensus.nih.gov/1987/1987HealthBenefitsPetsta003html.htm
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