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Title
Reciprocal effects of response contingent and noncontingent intravenous heroin on in vivo nucleus accumbens shell versus core dopamine in the rat: a repeated sampling microdialysis study.
Although passive administration of heroin to drug-naive rats increases extracellular dopamine (DA) in the nucleus accumbens (NAc), its ability to do so also after active drug exposure (self-administration) is debated.