共 28 条
[2]
BETKERUR MV, 1981, PEDIATRICS, V68, P99
[3]
CAMPBELL AN, 1981, LANCET, V1, P110
[4]
CANTOR B, 1980, J REPROD MED, V24, P220
[7]
DEWIT W, 1988, BRIT J OBSTET GYNAEC, V95, P303
[9]
GOUDIE BM, 1979, LANCET, V2, P1187