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. 2019 Sep 24;2:93. doi: 10.1038/s41746-019-0171-4

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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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Fig. 1 — Average cursor tremor count and average cursor tremor frequency, by age and gender. a Mean average number of cursor tremor events per age group and gender, and b mean average cursor tremor frequency per age group and gender. Error bars denote standard error of the mean. To compute the macro-average used in b, the average cursor tremor frequency per searcher is computed and then averaged again across all searchers in each age group category. This ensures that no single searcher unduly influences overall statistics