共 40 条
[31]
OWEN G, 1966, CAN MED ASSOC J, V95, P167
[33]
SZNAJDERMAN M, 1963, LANCET, V1, P962
[34]
TAPIA HR, 1973, OBSTET GYNECOL, V41, P643
[39]
WOODS JW, 1967, LANCET, V2, P653
[40]
1977, BRIT MED J, V1, P862