共 17 条
[1]
ANSEL R, 1983, AM J MED, V73, P14
[2]
BLACKWELL AL, 1983, LANCET, V2, P1379
[3]
BRAND JM, 1986, OBSTET GYNECOL, V68, P682
[7]
GREAVES WL, 1988, OBSTET GYNECOL, V72, P799
[9]
LIVENGOOD CH, 1990, OBSTET GYNECOL, V76, P118
[10]
MEAD PB, 1989, CONTEMP OBSTET GYNEC, V34, P76