Genetics and Public Health in the 21st Century
Figure 1. The estimated number of participants for components of the quality assurance program in 1998.
Enriched Concentrations (mg/dL whole blood)
[A text description of this chart is also available.]
Figure 2. Comparison of mean reported concentrations by method for phenylalanine quality control materials.
Figure 3. The summary of performance evaluation errors by domestic and foreign laboratories in 1998.
Figure 4. The length of time that leftover newborn screening dried-blood-spot specimens are kept by state screening programs.