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. 2018 Jun 4;13:89. doi: 10.1186/s13023-018-0827-1

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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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — Survival in the overall population and according to cognitive impairment. Kaplan–Meier survival analysis for (a) all patients in the overall population (N = 61) and (b) patients in the overall population with and without cognitive impairment (n = 40 and n = 16, respectively). The overall population contains both prospective and retrospective patients. CI, confidence interval; NR, not reached