TY  - RPRT
TI  - First-trimester Down syndrome screening.
AU  - Terrence W Hallahan
AU  - David A Krantz
AU  - V James Macri
AU  - Thomas J Shine
PY  - 2006
DO  - 10.1373/clinchem.2005.059279
UR  - https://pubmed.ncbi.nlm.nih.gov/16391341/
ID  - 16391341
ER  -