共 37 条
[1]
ANDREWS J, 1972, J OBSTET GYN BR COMM, V79, P1057
[2]
ASTRUP P, 1972, LANCET, V2, P1220
[9]
DAVIES, 1976, LANCET, V1, P385
[10]
DIVERS WA, 1981, AM J OBSTET GYNECOL, V139, P482