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. 2022 Oct 4;9:600. doi: 10.1038/s41597-022-01704-9

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© The Author(s) 2022

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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — Geographical locations at which experimental data were collected. Points denote which order of amphibians were assayed (point filling), at which life stage (point border) and in what language were the findings published (point shape). Note that geographical coordinates were missing for 659 (21.3%) of the estimates, notably when animals were raised in the laboratory for numerous generations.