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3. Centers for Disease Control and Prevention. National HAI standardized infection ratio (SIR), report, July–December 2009. Available from: http://www.cdc.gov/HAI/pdfs/stateplans/SIR-2010_JunDec2009.pdf. Accessed April 11, 2011.
4. Centers for Disease Control and Prevention. State-specific supplement to the national healthcare-associated infection standardized infection ratio (SIR) report, July 2009 through December 2009. Available from: http://www.cdc.gov/HAI/pdfs/stateplans/state-specific-hai-sir-july-dec2009r.pdf. Accessed April 11, 2011.
5. Centers for Disease Control and Prevention. Outline for healthcare-associated infection surveillance. Available from: http://www.cdc.gov/nhsn/PDFS/OutlineForHAISurveillance.pdf. Accessed December 6, 2010.