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