TY  - RPRT
TI  - Decision analysis and screening for Down's syndrome. Not using age specific values invalidates study.
AU  - K Spencer
PY  - 1995
DO  - 10.1136/bmj.311.7016.1371d
UR  - https://pubmed.ncbi.nlm.nih.gov/7496308/
ID  - 7496308
ER  -