共 20 条
[1]
DOWNS-SYNDROME - RECENT TRENDS IN THE UNITED-STATES
[J].
JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION,
1981, 246 (07)
:758-760
[2]
BAILY J, 1973, DISPROPORTIONATE SHO, P549
[3]
BAUMGARTEN A, 1985, LANCET, V1, P1280
[5]
BERGSMA D, 1979, BIRTH DEFECTS COMPEN, P215
[6]
COLLET M, 1983, DIAGNOSTIC ANTENATAL, P167
[8]
CUCKLE HS, 1984, LANCET, V1, P926
[9]
DEFOORT P, 1982, ULTRASOUND MED BIO S, V1