Screening for Down syndrome.
Wald
N J
NJ
Cuckle
H S
HS
Sneddon
J
J
Haddow
J E
JE
Palomaki
G E
GE
D004314:Down Syndrome; D006801:Humans; D008403:Mass Screening; D008423:Maternal Age; D012307:Risk Factors; D000509:alpha-Fetoproteins / Q000032:analysis
D000509:alpha-Fetoproteins