TY  - RPRT
TI  - Practice variations in biochemical screening for Down syndrome.
AU  - R R Lenke
AU  - K Walkowicz
AU  - K Baker
DO  - 10.1089/gte.1997.1.279
UR  - https://pubmed.ncbi.nlm.nih.gov/10464658/
ID  - 10464658
ER  -