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. 2018 Feb 1;9:16. doi: 10.3389/fneur.2018.00016

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Copyright © 2018 Simpson, van der Mei, Lucas, Ponsonby, Broadley, Blizzard, Ausimmune/AusLong Investigators Group and Taylor.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Kaplan–Meier plots of recreational summer sun exposure durations and risk of conversion to multiple sclerosis (MS) and of relapse. (A) summer weekend and MS; (B) summer weekend and relapse; (C) summer holidays and MS; and (D) summer holidays and relapse.