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Intra-NAc effects of A2A receptor antagonists KW 6002 (KW; 1–2.5 μg/side), SCH 58261 (SCH; 1–2.5 μg/side), and CGS 21680 (CGS; 1–2.5 ng/side) on cocaine (COC; 0.5 mg/kg/infusion) self-administration in rats. The number of active and inactive lever presses (upper panels) and the number of cocaine infusions (lower panels) are shown as the mean (±SEM). VEH—vehicle. N = 6–8 rats/group
