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. 2017 Feb 24;7:36. doi: 10.1038/s41598-017-00081-3

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© The Author(s) 2017

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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Age and zonal distribution of TB among resident Singaporeans in the year 2000. The values are adjusted for the population size and expressed per 10,000 of the susceptible population. Plots were created in statistical program R²² using the package spatstat ¹⁹. Administrative and national political coordinates of Singapore were provided, for academic research and publication, by the Singapore Land Authority (SLA)²⁴.