共 19 条
[1]
[Anonymous], AM J OBSTET GYNECOL
[2]
[Anonymous], 2002, Cochrane Database Syst Rev, DOI DOI 10.1002/14651858.CD000933
[4]
Clark SL, 2008, AM J OBSTET GYNECOL, V199
[5]
Clark SL, 2007, AM J OBSTET GYNECOL, V196, P526, DOI 10.1016/j.ajog.2007.02.021