Endocannabinoid regulation of acute and protracted nicotine withdrawal: effect of FAAH inhibition.

PLoS One · 2011 · PMC3227620 · PMID 22140525

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a clear trendno p-value reported

A clear trend to increase of these signs following nicotine cessation was always observed.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.