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. 2016 Sep 14;16(9):1494. doi: 10.3390/s16091494

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© 2016 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).

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Distributions of root mean square errors (RMSEs) of respiratory rate (RR) estimation results when the proposed method and the smart fusion algorithms were applied to the same dataset. Lower quartile, median, and upper quartile values are displayed in the box plots. Whiskers are used to represent the most extreme values within 1.5 times the interquartile range from the quartile. Outliers are displayed as crosses. * (p < 0.05) and *** (p < 0.001) represent a statistically significant difference.