Drupal-Bibcite31<style face="normal" font="default" size="100%">National Nosocomial Infections Surveillance (NNIS) System Report, data summary from January 1992 through June 2004</style><style face="normal" font="default" size="100%">National Nosocomial Infections Surveillance (NNIS) System Report, data summary from January 1992 through June 2004</style>