共 4 条
[1]
Brindley B A, 1988, Obstet Gynecol Surv, V43, P730, DOI 10.1097/00006254-198812000-00004
[3]
FLETCHER H, 1994, OBSTET GYNECOL, V83, P244
[4]
MARGUILIES M, 1992, LANCET, V339, P364