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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
K. Offerdal, H.-G. K. Blaas, S. H. Eik-NesVolume:
32
Year:
2008
Language:
english
Pages:
8
DOI:
10.1002/uog.5373
File:
PDF, 92 KB
english, 2008