共 22 条
[1]
Alexander GR, 1996, PUBLIC HEALTH REP, V111, P408
[3]
BRETT KM, 1994, AM J OBSTET GYNECOL, V170, P41
[7]
FOSTER DC, 1992, OBSTET GYNECOL, V79, P40
[8]
Fuentes-Afflick E, 1998, ARCH PEDIAT ADOL MED, V152, P1105