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. Author manuscript; available in PMC: 2017 May 25.
Published in final edited form as: Physiol Behav. 2015 Oct 9;159:33–39. doi: 10.1016/j.physbeh.2015.10.006

Figure 2.

Figure 2

Mean (± SEM) amount of time participants (n=17) kept their hand immersed in cold water (4° C), and plasma oxycodone concentration (ng/ml), shown as a function of each preceding PIO maintenance condition.