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. Author manuscript; available in PMC: 2015 May 1.
Published in final edited form as: Drug Alcohol Depend. 2014 Feb 26;138:17–23. doi: 10.1016/j.drugalcdep.2014.02.021

Figure 1.

Figure 1

Experiment timeline. Rats arrive at PND 28 followed by 12 d of habituation to the viviarium. Handling and weighing of rats began on the 7th d. Treatment began at PND 41–50, followed by a 5-d washout period. Behavioral pretraining began at PND 55. The self-dosing phase started after behavioral testing was completed (PND 119–173).