3Ness RB, Kip KE, Hillier SL, et al. A Cluster Analysis of Bacterial Vaginosis - associated Microflora and Pelvic Inflammatory Disease[J]. Amer J Epi, 2005, 162(6) :585 - 590.
4Ratelle S, Yokoe D, Blejan C, et al. Predictive Value of Clinical Diagnostic Codes for the CDC Case Definition of Pelvic Inflammatory Disease (PID) : Implications for Surveillance[ J]. Sex Transm Dis, 2003, 30(11):866 -870.