TY  - RPRT
TI  - Serum screening for Down's syndrome.
AU  - J Bibby
AU  - M J McCormack
PY  - 1994
DO  - 10.1111/j.1471-0528.1994.tb13167.x
UR  - https://pubmed.ncbi.nlm.nih.gov/7517183/
ID  - 7517183
ER  -