In the Results section of the Abstract, the last sentence was incorrect. The correct sentence appears below.
STR and GTR were independent predictors of improved survival in historically classified oligodendrogliomas (HR 0.83, p = 0.18; HR 0.69, p = 0.01, respectively) and in 1p/19q-codeleted tumors (HR 0.49, p < 0.01; HR 0.43, p < 0.01, respectively).
The article has been corrected online as of June 5, 2020.
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