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. 2019 Mar 12;147:e148. doi: 10.1017/S0950268819000426

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© The Author(s) 2019

This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike licence (http://creativecommons.org/licenses/by-nc-sa/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the same Creative Commons licence is included and the original work is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use.

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Fig. 5. — Schematic maps of the City of Takikawa by districts and neighbouring municipalities April 2011–March 2012. (a): Districts classified by population density expressed as the quartiles. (b): Relationship between the registered number of cases and female population of each district. District identification numbers are in accordance with those of Part A. NM denotes neighbouring municipalities. *, The districts where the participated clinics or hospitals are located. Part C: Distributions of STs, classified into four (ST95, ST131, ST73, ST357) high-isolation-frequency, middle-isolation-frequency (MIF) or single-isolation-frequency (SIF) STs. Part D: Distributions of CRGs, which are identified by letters in circles. NM denotes neighbouring municipalities. Members of CRG H were isolated from 11 different districts or neighbouring cities, whereas only one district had only two isolates with an 11-month interval.