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. 2014 Apr 23;9(4):e95891. doi: 10.1371/journal.pone.0095891

Figure 2. Boxplot of the umbilical cord concentrations of perfluorooctane sulfonate (PFOS) (a) and perfluorooctanoic acid (PFOA) (b) in cases having attention deficit hyperactivity disorder and controls.

Figure 2

The extreme values of perfluorooctanoic acid for the ADHD cases, 48 and 36/ml, and for the controls, 66, 49, 31, and 23 ng/ml, are not presented in the boxplot.