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. 2022 Apr 4;163:107226. doi: 10.1016/j.envint.2022.107226

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Fig. 4 — Relative probability boxplots by observed exposure category based on prediction for PAH concentrations in wristbands (red) or OH-PAH concentrations in urine (blue) for the four comparisons with the highest observed Pearson’s correlation coefficients: phenanthrene (PHEN) and 2-OH– & 3-OH-PHEN, PHEN and 1-OH-PHEN, fluorene (FLU) and 2-OH-FLU, and naphthalene (NAPH) and 1-OH-NAPH. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)