OLIG2 is differentially expressed in pediatric astrocytic and in ependymal neoplasms.

J Neurooncol · 2011 · PMC3161192 · PMID 21193945

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showed a trendno p-value reported

The mean proportion of OLIG2+ cells that were also Ki67+ showed a trend to being associated with increasing tumor grade.

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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.