共 19 条
[1]
ANDERSSON K, 1992, OBSTET GYNECOL, V79, P963
[3]
Duursma S A, 1992, Obstet Gynecol Surv, V47, P38, DOI 10.1097/00006254-199201000-00015
[5]
FANTL JA, 1988, OBSTET GYNECOL, V71, P823
[8]
HAHN RG, 1984, J FAM PRACTICE, V18, P411