Gamma knife radiosurgery for recurrent gliomas.

J Neurooncol · 2018 · PMC6267255 · PMID 30191361

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highly significantno p-value reported

There was a highly significant increase in both PFS and OS according to tumor grade; i.e. the lower the tumor grade, the better the outcome ( Fig. 2 ) .

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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.