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. 2015 Oct 6;15:411. doi: 10.1186/s12879-015-1118-2

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© Griffiths et al. 2015

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. 2 — Distribution of association of pairs of infections on death certificates in the USA (left) and England and Wales (right). Solid black lines are the density curves of standardised residuals for the number of co-infection deaths from Chi-squared tests. Vertical dashed grey line at zero residual. Inset shows the whole distribution