Thursday, August 13, 2009

References

  • (2009) How the Eye Works. Refractec. MyClearVision. Retrieved July 29, 2009, from, http://www.myclearvision.com/110.asp

  • National Institute of Arthritis and Musculoskeletal and Skin Disease (2009). Ankylosing Spondylitis. Retrieved July 22, 2009, from MedlinePlus database.

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