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. 2016 Oct 13;14:146. doi: 10.1186/s12955-016-0549-9

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© The Author(s). 2016

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. 1 — Severity of each symptom according to the presence of any other symptom. Light blue represents individuals with only one of the corresponding symptoms on the x-axis. Blue represents individuals with any other symptoms in the presence of the corresponding symptom. Symptom severity was assessed on a seven-point Likert scale ranging from one to seven