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S1
(2005 March). Fast Facts About Gout [13 paragraphs]. NIAMS [On-line information]. Available FTP: http://www.niams.nih.gov/hi/topics/gout/ffgout.htm

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(2002 March, Currently being updated). Questions and Answers about Gout [30 paragraphs]. NIAMS [On-line information]. Available FTP: http://www.niams.nih.gov/hi/topics/gout/gout.htm

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(2005 November 14). Gout [29 paragraphs]. MayoClinic.com [On-line information]. Available FTP: http://www.mayoclinic.com/health/gout/DS00090

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Schumacher, H. (2006 June, Updated). Pseudogout [13 paragraphs]. American College of Rheumatology [On-line information]. Available FTP: http://www.rheumatology.org/public/factsheets/pseudogout_new.asp?and=pat

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Chen, A. (2005 June 7, Updated). Synovial fluid analysis [10 paragraphs]. MedlinePlus Medical Encyclopedia [On-line information]. Available FTP: http://www.nlm.nih.gov/medlineplus/ency/article/003629.htm