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S1
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S2
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S4
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(2004 February 19). Using Antibiotics Sensibly [21 paragraphs]. Mayoclinic.com, Infectious Disease Center [On-line information]. Available FTP: http://www.mayoclinic.com/invoke.cfm?id=FL00075

S6
(2003 November). Multidrug-Resistant Tuberculosis Fact Sheet [22 paragraphs]. American Lung Association [On-line information]. Available FTP: http://www.lungusa.org/site/pp.asp?c=dvLUK9O0E&b=35815

S7
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