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. 2019 Oct 25;19:1373. doi: 10.1186/s12889-019-7761-6

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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 — Hospitalization expenses for different hospital types under different insurance schemes (Comparison of UEBMI enrollees and URBMI enrollees: first-level hospital, Z = 3.931, p < 0.001; secondary-level hospital, Z = 6.824, p < 0.001; tertiary-level hospital, Z = −2.133, p = 0.033)