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. 2021 Jul 16;11:14578. doi: 10.1038/s41598-021-93983-2

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Location maps. (a) Sulawesi Island, including Mamuju region which was the study HNBRA and Topoyo Village which was the study NBRA. (b) Villages of the study in Mamuju region. HNBRA refer to the high natural background radiation area and control area (CA) refers to the normal background radiation area (NBRA) or control area. Maps were created in MAPINFO PROFESSIONAL version 10.5 (https://www.precisely.com/product/precisely-mapinfo/mapinfo-pro) using map data derived from the National Mapping Agency of Indonesia (https://tanahair.indonesia.go.id/portal-web).