TY  - GEN
AU  - Ruta,D A
AU  - Leece,J G
TI  - Screening policy for Down syndrome
SN  - 0140-6736
PY  - 1988///1021
KW  - Chorionic Gonadotropin
KW  - blood
KW  - Down Syndrome
KW  - England
KW  - Estriol
KW  - Female
KW  - Humans
KW  - Maternal Age
KW  - Pregnancy
KW  - Pregnancy, High-Risk
KW  - alpha-Fetoproteins
KW  - analysis
N1  - Publication Type: Letter
UR  - https://doi.org/10.1016/s0140-6736(88)90230-9
ER  -