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. 2019 Aug 27;19:209. doi: 10.1186/s12883-019-1441-0

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© The Author(s). 2019

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 — Short Title Confirmatory Factor Analysis. Three factors model: standard values. Detailed legend Standard values of 3 factor model. Q refers to item number on the Treatment Burden Questionnaire as detailed in Table 3. Questions 6, 12 and 13 were excluded because their factorial load was low