4Nugent RP, Krohn MA, Hillier SL. Reliability of diagnosing bac- terial vaginosis is improved by a standardized method of gram stain interpretation[J]. J Clin Microbiol,1991,29:297-301.
5Morris M, Nicoll A, Simms I,et al. Bacterial vaginosis: a public health review[J]. BrJ Obstet Gynecol,2001,108 :439-450.