9Carey JC,Klebanoff MA,Hauth JC,et al.Metronidazole to prevent preterm delivery in pregnant women with asymptomatic bacterial vaginosis. National Institute of Child Health and Human Deve- lopment Network of Maternal-Fetal Medicine Units[J].N Engl J Med,2000,342(8):534-540.
10Johnson HL, Ghanem KG,Zenilman JM,et al.Sexually transmitted infections and adverse pregnancy outcomes among women atten- ding inner city public sexually transmitted diseases clinics[J].Sex Transm Infect,2011,38 (3): 167-171.
