TY  - GEN
AU  - Evans,Mark I
AU  - O'Brien,Joseph E
AU  - Dvorin,Elena
AU  - Wapner,Ronald J
AU  - Harrison,Harold H
TI  - Standardization of methods reduces variability: explanation for historical discrepancies in biochemical screening
SN  - 1090-6576
PY  - 2003///1125
KW  - Biomarkers
KW  - analysis
KW  - Chorionic Gonadotropin, beta Subunit, Human
KW  - Diagnostic Tests, Routine
KW  - standards
KW  - Enzyme-Linked Immunosorbent Assay
KW  - Estriol
KW  - Female
KW  - Humans
KW  - Pregnancy
KW  - Reproducibility of Results
KW  - alpha-Fetoproteins
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1089/109065703321561001
ER  -