Concentration of UCA isomers in suction blister fluid. A, Bar chart comparing mean levels of UCA (cis-UCA and trans-UCA isomers combined) in suction blister fluid between different subject groups. The narrow bar shows SEMs. P = .66, Kruskal-Wallis test. B, Dot plot comparing mean levels of cis-UCA between different subject groups. Bars show means ± SEMs. P = .65, Kruskal-Wallis test. C, Dot plot comparing mean levels of trans-UCA between different subject groups. Bars show means ± SEMs. P = .66, Kruskal-Wallis test. Note the approximately 200-fold difference between cis- and trans-UCA concentrations.