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Drugs abused by humans preferentially increase synaptic dopamine concentrations in the mesolimbic system of freely moving rats.

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Therapeutic Doses of Oral Methylphenidate Significantly Increase Extracellular Dopamine in the Human Brain

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Effects of Methylphenidate on Extracellular Dopamine, Serotonin, and Norepinephrine: Comparison with Amphetamine

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Methylphenidate bioavailability from two extended-release formulations

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