4Christian BB. Guideline for treatment of hospital-acquired pneumonia. Sem Respir Criti Care Med,2002,23:457-469.
5American Thoracic Society. Hospital-acquired pneumonia :diagnosis,assessment of severity, initial antimicrobial therapy, and preventive strategies ;a consensus statement. Am J Respir Crit Care Med, 1996,153:1711-1725.
6Hanes SD, Demirkan K, Tolley E, et al. Risk factors for late-onset nosocomial pneumonia caused by Stenotrophomonas maltophilia in critically ill trauma patients. Clin Infect Dis,2002,35:228-235.
7Matin HK. Appropriate empirical antibacterial therapy for nosocomial infections. Drugs,2003,63:2157-2168.
8Moine P,Timsit JF, De Lassence A, et al. Mortality associated with late-onset pneumonia in the intensive care unit: results of a multicenter cohort study. Intensive Care Med ,2002 ,28 : 154-163.
