%0 Journal Article %T Reproducibility of Risk Figures in 2nd-Trimester Maternal Serum Screening for Down Syndrome: Comparison of 2 Laboratories %A Benn, Peter, A %A Makowski, Gregory, S %A Egan, James, FX %A Wright,, Dave %J Clinical Chemistry %V 52 %N 11 %@ 0009-9147 %D 2006-11-01 %I Oxford Academic %~ DeepDyve