Reference samples with high (HC) and low (LC) P4 concentrations were included. In experiment 1, the intra-assay coefficients of variation were 1.67% and 1.27% for HC and 0.19% and 0.11% for LC
Reference samples with high (HC) andlow (LC) P4 concentrations were included. In experiment 1,the intra-assay coefficients of variation were 1.67% and1.27% for HC and 0.19% and 0.11% for LC