Basal ganglia dysfunction in idiopathic REM sleep behaviour disorder parallels that in early Parkinson's disease.

Brain · 2016 · PMC4958897 · PMID 27297241

Europe PMC DOI

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failed to reach significanceno p-value reported

showed a trendno p-value reported

RBD patients showed a trend towards reduced 123 I-ioflupane uptake compared to normal controls that failed to reach significance in all five regions of interest.

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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.