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Cross-trimester marker ratios in prenatal screening for Down syndrome |
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| Authors: | Nicholas J Wald Jonathan P Bestwick Joan K Morris |
| Institution: | Department of Environmental and Preventive Medicine, Wolfson Institute of Preventive Medicine, Barts and the London Queen Mary's School of Medicine and Dentistry, Charterhouse Square, London, UK |
| Abstract: | |
| Keywords: | Down syndrome Integrated test cross-trimester marker ratio prenatal screening |