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. 2021 Oct 5;141(3-4):505–517. doi: 10.1007/s00439-021-02376-y

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© The Author(s) 2021

Open AccessThis 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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Fig. 2 — Geographical distribution of HI genes in Africa. A A geographical plot of the genes reported from different African countries. The geographical distribution of four common GJB2 variants reported in Africa: B GJB2: c.35delG: p.(G12Vfs*2), C GJB2: c.427C>T: p.(R143W), D GJB2: c.139G>T: p.(E47*), E GJB2: c.109G>A: p.(V37I). The total number of mutant alleles (allele frequency in percentages) per country was displayed on the map