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Cytotoxicity analysis of a neuroblastoma cell line (SH-SY5Y) exposed for 24 h to oxycodone (A) and naloxone (B). The results were analyzed by the Kruskal–Wallis test followed by Dunn’s post-test and presented as the median ± interquartile interval (n = 3–4). C: control, nonexposed cells.
