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Median (interquartile range) a) 3,4-methylenedioxymethamphetamine (MDMA) and 4-hydroxy-3-methoxymethamphetamine (HMMA); and b) 3,4-methylenedioxyamphetamine (MDA) and 4-Hydroxy-3-methoxyamphetamine (HMA), in blood over 3 h after oral 1.0 and 1.6 mg/kg MDMA administration to adult users
