TY  - RPRT
TI  - A prenatal trisomy 21 screening program using alpha-fetoprotein, human chorionic gonadotropin, and free estriol assays on maternal dried blood.
AU  - A Verloes
AU  - R Schoos
AU  - C Herens
AU  - A Vintens
AU  - L Koulischer
PY  - 1995
DO  - 10.1016/0002-9378(95)90108-6
UR  - https://pubmed.ncbi.nlm.nih.gov/7531397/
ID  - 7531397
ER  -