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. 2018 Dec 6;6:218. doi: 10.1186/s40168-018-0592-3

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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. 7 — Correlations with tap water composition. Heatmap of correlations between relative abundances of genera with measurements of various components of tap water. Samples that primarily drank from bottled water (505 out of 1319) at home were excluded here. Color indicates Pearson correlation coefficients and “+” indicates a statistically significant correlation