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. 2019 Apr 6;18:88. doi: 10.1186/s12944-019-1041-4

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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. 6 — Funnel plot detailing publication bias in the studies reporting the impact of UDCA on lipid indices. Open circles represent observed published studies while closed circles represent imputed unpublished studies using trim and fill method