TY  - RPRT
TI  - Model-based screening by risk with application to Down's syndrome.
AU  - P Royston
AU  - S G Thompson
PY  - 1992
DO  - 10.1002/sim.4780110211
UR  - https://pubmed.ncbi.nlm.nih.gov/1533726/
ID  - 1533726
ER  -