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. 2015 Apr 23;12:41. doi: 10.1186/s12984-015-0032-6

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© Germanotta et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Movement smoothness indices. Means of the Normalized Jerk (left) and the Speed Metric (right), with error bars representing standard error. The symbol *** indicates a significant difference between the two groups (p < 0.001).