A cost-benefit analysis of prenatal detection of down syndrome and neural tube defects in older mothers
1981 ◽
Vol 10
(4)
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pp. 367-378
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1982 ◽
Vol 12
(1)
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pp. 63-73
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1999 ◽
Vol 180
(5)
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pp. 1227-1233
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2000 ◽
Vol 95
(4)
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pp. 577-583
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2000 ◽
Vol 96
(3)
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pp. 481
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