(Q38514827)
Statements
1 reference
Maternal serum unconjugated oestriol and human chorionic gonadotrophin levels in twin pregnancies: implications for screening for Down's syndrome (English)
1 reference
N. Wald
H. Cuckle
T. S. Wu
1 September 1991
1 reference
1 reference
98
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9
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905-908
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Identifiers
1 reference