TY  - RPRT
TI  - Screening for Down's syndrome.
AU  - R M Keatinge
AU  - E S Williams
PY  - 1991
DO  - 10.1136/bmj.303.6809.1063
UR  - https://pubmed.ncbi.nlm.nih.gov/1835415/
ID  - 1835415
ER  -