The effects of exercise on cognition in Parkinson's disease: a systematic review.

Transl Neurodegener · 2014 · PMC3936925 · PMID 24559472

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showed a trendno p-value reported

Overall, both the pre-clinical and clinical studies showed a trend of selective reporting for only significant outcomes.

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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.