7Makedou KG, Tsiakiri EP, Bisiklis AG, et al. Changes in antibiotic resistance of the most common Gram - negative bacteria isolated in intensive care units[J].J Hosp Infect, 2005,60 ( 3 ) : 245 - 248.
9Salata R A, Lederman MM, Shlasee DM, et al. Diagnosis of nosocomoial pneumonia in intubated intensive careunit patients. Am Rev Respir Dis,1987,135:426.