Figure 5

Red-cell folate immunoassay errors over time. A. Elecsys 2010 - Advia Centaur. B. Unicel Dxl 800 - Advia Centaur. C. Elecsys 2010 - Unicel Dxl 800. The dotted lines are for equality, or zero error. The dashed lines are the 95% confidence interval, and the dot-dashed lines are the 99.9% confidence interval.