4Larsson P G, Platz Christensen J J, Thejls H,et al. Incidence of pelvic inflammatory disease after first trimester IegaI abortion in- women with bacterial vaginosis after treatment with metronidazole : a double - blind, randomized study [ J ]. Am J Obstet GynecoI, 1992,166 : 100 - 103.
3Westr(o)m L,Joesoef R,Reynolds G,et al.Pelvic inflammatory disease and fertility.A cohort study of 1844 wolnen with laparoscopically verified disease and 657 control women with normal laparoscopic results[J].Sex Transm Dis,1992,19(4):185-192.
