TY  - GEN
AU  - Wallace,E M
TI  - Multiple marker screening for Down syndrome in the first trimester of pregnancy
SN  - 0004-8666
PY  - 1997///1126
KW  - Chorionic Gonadotropin, beta Subunit, Human
KW  - blood
KW  - Down Syndrome
KW  - diagnosis
KW  - Female
KW  - Humans
KW  - Infant, Newborn
KW  - Maternal Age
KW  - Pregnancy
KW  - Pregnancy Trimester, First
KW  - Prenatal Diagnosis
KW  - methods
KW  - Sensitivity and Specificity
N1  - Publication Type: Comment; Letter
ER  -