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Gooch CM, Rakitin BC, Cooper ZD, Comer SD, Balsam PD.Gooch CM, et al. Among authors: cooper zd.Behav Pharmacol. 2011 Aug;22(4):354-61. doi: 10.1097/FBP.0b013e328348d8b8.Behav Pharmacol. 2011.PMID: 21750426Free PMC article.Clinical Trial.