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Geographical distribution of toxicology sample origins for cases involving a) carfentanil, b) U-47700, c) eutylone, d) flualprazolam, e) N-ethylpentylone, f) 5F-MDMB-PICA, g) isotonitazene, and h) brorphine, as well as i) a combined map for all cases included in this study demonstrating national landscape.
