TY  - RPRT
TI  - Prenatal screening for Down's syndrome.
AU  - P M Gocze
AU  - A Arany
AU  - D A Freeman
PY  - 1992
DO  - 10.1056/nejm199212313272712
UR  - https://pubmed.ncbi.nlm.nih.gov/1280772/
ID  - 1280772
ER  -