(Q44222006)
Statements
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Prenatal detection of trisomy 21 by second-trimester ultrasound examination and maternal age in a non-selected population of 49 314 births in Norway (English)
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S H Eik-Nes
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K Offerdal
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H-G K Blaas
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1 September 2008
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32
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4
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493-500
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Identifiers
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1 reference