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. 2018 Jan 10;137(3):523–532. doi: 10.1007/s11060-017-2738-8

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 2 — Flowchart of enrolment and attrition. NPA neuropsychological assessment, LGG low-grade glioma, MEN meningioma, KPS Karnofsky performance score