Dissociated grey matter changes with prolonged addiction and extended abstinence in cocaine users.

PLoS One · 2013 · PMC3601087 · PMID 23527239

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may be significantno p-value reported

The observation of elevated GM reported in bilateral precentral gyrus with years of use may be significant insofar as it may reflect elevated environmental exploration on the part of the addict to procure the abused substance [75] .

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