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. Author manuscript; available in PMC: 2017 Oct 1.
Published in final edited form as: Tob Regul Sci. 2016 Oct;2(4):329–342. doi: 10.18001/TRS.2.4.5

Appendix B. Daily Responding During the Acquisition Phase of Experiment 2.

Appendix B

Note. Mean (±SEM) responses on the active and inactive lever on consecutive sessions during the acquisition phase of Experiment 2 for each indicated formulation.