5[1]Spencer RC. Epidemiology of infection in ICUs[J] . Int Care Med, 1994;20:2-6.
6[2]Widmer AF. Infection control and prevention strategies in the ICU [J]. Iht Care Med, 1994;20:7 - 11.
7[5]Vincent JL, Bihari DJ, Suter PM, et al. The prevalence of nosocomial infection in intensive care units in Europe[J]. JAMA,1995; 274: 639 - 645.
8National Nosocomial Infections Surveillance (NNIS) System. Data summary from January 1992 through June 2004. Am J Infect Control, 2004, 32:470- 485.
9Fine MJ, Smith MA, Carson CA, et al. Prognosis and outcomes of patients with community-acquired pneumonia. A meta-analysis. JAMA, 1996, 275 : 134 - 139.