共 33 条
[2]
BEJAR R, 1981, OBSTET GYNECOL, V57, P479
[4]
CHEN KCS, 1979, J CLIN INVEST, V63, P825
[7]
DUNKELBERG WE, 1962, OBSTET GYNECOL, V20, P629
[10]
GRAVETT MG, 1986, JAMA-J AM MED ASSOC, V256, P1899