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Nitsche JF, Schuller AGP, King MA, Zengh M, Pasternak GW, Pintar JE. Genetic Dissociation of Opiate Tolerance and Physical Dependence in δ-Opioid Receptor-1 and Preproenkephalin Knock-Out Mice. J. Neurosci. 2002 Dec 15;22(24):10906–13. doi: 10.1523/jneurosci.22-24-10906.2002. |