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. Author manuscript; available in PMC: 2013 Jul 23.
Published in final edited form as: Eur J Pharmacol. 2007 Jun 5;571(1):1–7. doi: 10.1016/j.ejphar.2007.05.033

Fig. 3.

Fig. 3

Coronal sections of the atlas of Paxinos and Watson (1997) showing the microjection sites for (+)-morphine and (−)-morphine given into ventral periaqueductal gray of the experiments shown in Fig. 1 and Fig. 2.