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Copyright © 2009 Michael M. Morgan et al. This is an open access article distributed under the
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How to Cite this Article
Michael M. Morgan, Michelle D. Ashley, Susan L. Ingram, and MacDonald J. Christie, “Behavioral Consequences of Delta-Opioid Receptor Activation in the Periaqueductal Gray of Morphine Tolerant Rats,” Neural Plasticity, vol. 2009, Article ID 516328, 7 pages, 2009. doi:10.1155/2009/516328