TY  - RPRT
TI  - Screening for Down syndrome.
AU  - R W Oliver
AU  - R P Ager
PY  - 1988
DO  - 10.1016/s0140-6736(88)91515-2
UR  - https://pubmed.ncbi.nlm.nih.gov/2451099/
ID  - 2451099
ER  -