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. Author manuscript; available in PMC: 2019 Jan 1.
Published in final edited form as: Neuropharmacology. 2017 Sep 21;128:33–42. doi: 10.1016/j.neuropharm.2017.09.029

Figure 4.

Figure 4

(A) Total infusions in combined i.o. flavorant and i.v. nicotine subjects across all reinforcement schedules. (B) Average nicotine infusions during FR1 sessions. (C) Total infusions earned for combined i.o. flavorant and i.v. saline subjects across all reinforcement schedules. (D) Average saline infusions during FR1 sessions. Post-hoc with Bonferroni correction: * p < 0.05, ** p < 0.01, **** p < 0.0001 between flavors in (B) and (D). Error bars indicate SEM. Rats in the i.o. water and nicotine/saline groups (Figure 2) and from the i.o. sucrose and nicotine/saline groups (Figure 3) are replotted here for comparison.