共 19 条
[1]
ARIAS F, 1982, OBSTET GYNECOL, V60, P277
[4]
CROWLEY P, 2003, COCHRANE DATABASE SY
[6]
GOLDENBERG RL, 1984, OBSTET GYNECOL, V64, P480
[7]
GONEN R, 1989, OBSTET GYNECOL, V74, P347
[8]
GRANT J, 1989, EFFECTIVE CARE PREGN, P1112