Published on in Vol 9 , No 4 (2021) :Oct-Dec
Preprints (earlier versions) of this paper are available at https://preprints.jmir.org/preprint/28079, first published .
1 Intelligent Sensing Laboratory, School of Engineering, Newcastle University, Newcastle upon Tyne, GB
2 Edinburgh Neuroprosthetics Laboratory, School of Informatics, University of Edinburgh, Edinburgh, GB
3 Networked and Ubiquitous Systems Engineering Group, School of Computing, Newcastle University, Newcastle upon Tyne, GB