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First trimester Down syndrome screening with dried blood spots using a dual analyte free beta hCG and PAPP-A immunofluorometric assay |
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| Authors: | David Krantz Terrence Hallahan Rachel Ravens Kuanglin He Howard Cuckle John Sherwin Jonathan Carmichael |
| Institution: | 1. NTD Laboratories/PerkinElmer, Melville, NY, USA;2. Department of Obstetrics and Gynecology, Columbia University Medical Center, New York, NY, USA |
| Abstract: | |
| Keywords: | free beta hCG PAPP-A maternal serum screening dried blood fetal ultrasound |