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Pooled odds ratios for ADHD associated with polyfluoroalkyl substances concentrations: comparison of the highest category with the lowest category. (A): PFOA; (B): PFOS. Abbreviations: CI, confidence interval; OR, odds ratio; PFOA, perfluorooctanoate; PFOS, perfluorooctane sulfonate; ADHD: attention deficit hyperactivity disorder [42,43,47,48,50].
