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. Author manuscript; available in PMC: 2012 Oct 15.
Published in final edited form as: J Neurosci Methods. 2011 Aug 12;201(2):390–398. doi: 10.1016/j.jneumeth.2011.08.011

Fig. 2.

Fig. 2

Experimental design and time course of the study. Animals participating in the morphine study received an intrathecal injection of morphine at the time indicated and those in the isoflurane study did not.