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. Author manuscript; available in PMC: 2017 Aug 1.
Published in final edited form as: Psychopharmacology (Berl). 2016 Jun 18;233(15-16):3009–3015. doi: 10.1007/s00213-016-4347-1

Figure 1.

Figure 1

Chronic continuous nicotine infusion (4 weeks at 0, 2.5 or 5 mg/kg/day, sc. N=10, 11 and 11 respectively) effects on IV nicotine self-administration, weekly mean response (mean±sem).