(Q43437027)
Statements
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Alteration in age-specific risks for chromosomal trisomy by maternal serum alpha-fetoprotein and human chorionic gonadotropin screening (English)
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O'Brien TJ
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C. H. Miller
T. J. O'Brien
S. Chatelain
B. B. Butler
1 March 1991
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11
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3
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153-158
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Identifiers
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