The value of arterial spin labelling in adults glioma grading: systematic review and meta-analysis.

Oncotarget · 2019 · PMC6422184 · PMID 30899427

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showed a trendno p-value reported

The absolute TBF showed a trend for lower in grade II patients by an average of 0.9 SDs.

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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.