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. 2019 Sep 4;18:53. doi: 10.1186/s12937-019-0482-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 — Maps showing age- and sex-adjusted stroke mortality rates and the prevalence of ramen restaurants in each Japanese prefecture. Red indicates high rate; blue indicates low rate. a Age-adjusted stroke mortality rate among men. b Age-adjusted stroke mortality rate among women. c Ramen restaurant prevalence per male resident. d Ramen restaurant prevalence per female resident