Published on in Vol 23, No 5 (2021): May
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/22431, first published
.
1 Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge, United Kingdom
2 Viterbi School of Engineering, University of South California, Los Angeles, CA, United States
3 Mathematics Research Center, Academy of Athens, Athens, Greece