Published on in Vol 21, No 9 (2019): September
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/11759, first published
.
1 eHealth Group, Roessingh Research and Development, Enschede, Netherlands
2 Biomedical Signals and Systems Group, University of Twente, Enschede, Netherlands