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. 2019 Feb 9;20:67. doi: 10.1186/s12891-019-2446-y

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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 — Geospatial localization of study patients who underwent Total Knee Arthroplasty by census tracts in the catchment area of the hospital (Created using ArcGIS software using base maps downloaded from the open access census website: https://www.census.gov/geo/maps-data/data/tiger-line.html)