TY  - RPRT
TI  - Contingent screening for Down syndrome.
AU  - Anne M Summers
AU  - Tianhua Huang
AU  - Chris Meier
AU  - Sandra A Farrell
PY  - 2005
DO  - 10.1002/pd.1245
UR  - https://pubmed.ncbi.nlm.nih.gov/16193459/
ID  - 16193459
ER  -