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. 2019 May 2;19:280. doi: 10.1186/s12913-019-4079-0

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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 — Overall variation in the Johns Hopkins Overuse Index in 2015. Quintiles of the JHOI calculated for each of the 422 MSA/rural region distinctions using commercial claims from the first half of 2015. Data not shown for South Carolina