2Warren DK, Shukla SJ, Olsen MA, et al. Outcome and attributable cost of ventilator-associated pneumonia among intensive care unit patients in a suburban medical center[J]. Crit Care Med, 2003, 31 (5): 1312-1317.
3Askarian M, Gooran NR. National nosocomial infection surveillance system-based study in Iran: additional hospital stay attribuable to nosocomial infections[J]. Am J Infect Control, 2003, 31(8):465- 468.
4Plowman R, Graves N, Griffin MA, et al. The rate and cost of hospital-acquired infections occurring in patients admitted to selected specialties of a district general hospital in England and the national burden imposed[J]. J Hosp Infect, 2001, 47(3):198-209.