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. 2021 Mar 10;9(3):e21331. doi: 10.2196/21331

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©Alberto Tena, Francec Claria, Francesc Solsona, Einar Meister, Monica Povedano. Originally published in JMIR Medical Informatics (http://medinform.jmir.org), 10.03.2021.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Medical Informatics, is properly cited. The complete bibliographic information, a link to the original publication on http://medinform.jmir.org/, as well as this copyright and license information must be included.

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Box plots of features by group. B: patients with amyotrophic lateral sclerosis (ALS) with bulbar involvement; C: control group; HNR: harmonics-to-noise ratio; NB: patients with ALS without bulbar involvement.