TY  - RPRT
TI  - Screening policy for Down syndrome.
AU  - D A Ruta
AU  - J G Leece
PY  - 1988
DO  - 10.1016/s0140-6736(88)90230-9
UR  - https://pubmed.ncbi.nlm.nih.gov/2458517/
ID  - 2458517
ER  -