3Yu YS, Zhou WL, Chen YG, et al. Epidemiological and antibiotic resistant study on ESBLs producing E. coli and K. pneumoniae in Zhejiang Province[J]. Chin Med J, 2002,115 (10) : 1479-1482.
4Ercole FF, Starling CE, Chianca TC, et al. Applicability of the National Nosocomial Infections Surveillance System risk index for the prediction of surgical site infections:a review[J]. Braz J Infect Dis,2007,11(1):134-141.