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. 2019 Nov 14;9:16771. doi: 10.1038/s41598-019-53353-5

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© The Author(s) 2019

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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Audiometric thresholds at 250–8000 Hz, recorded in decibels hearing level (dB HL). Black line shows mean thresholds across the group (N = 97). Grey lines show thresholds for individual participants, and orange lines show thresholds for the 8 participants who had audiometric thresholds worse than 20 dB at 4 or 8 kHz, who were excluded from the correlation analysis.