Varied behavioral responses induced by morphine in the tree shrew: a possible model for human opiate addiction.

Front Behav Neurosci · 2014 · PMC4171994 · PMID 25294994

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an increasing trendno p-value reported

In addition, the number of shuttles between the cage and nest box for the morphine-conditioned tree shrews had an increasing trend in the morphine-paired chamber on the test day than that on the pre-test day (Figure 2D ).

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