TY  - RPRT
TI  - Calculating correct Down's syndrome risks.
AU  - E M Wallace
AU  - S Mulvey
PY  - 1999
DO  - 10.1111/j.1471-0528.1999.tb08450.x
UR  - https://pubmed.ncbi.nlm.nih.gov/10492121/
ID  - 10492121
ER  -