TY  - RPRT
TI  - Antenatal screening for Down's syndrome.
AU  - J M Venn-Treloar
PY  - 1998
DO  - 10.1016/s0140-6736(05)79787-7
UR  - https://pubmed.ncbi.nlm.nih.gov/9798613/
ID  - 9798613
ER  -