Noninvasive prenatal detection and selective analysis of cell-free DNA obtained from maternal blood: evaluation for trisomy 21 and trisomy 18.
Sparks, Andrew B. PhD; Struble, Craig A. PhD; Wang, Eric T. PhD; Song, Ken MD *; Oliphant, Arnold PhD
American Journal of Obstetrics & Gynecology.
206(4):319e1-319e9, April 2012.
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