Published on in Vol 7 , No 4 (2021) :Oct-Dec
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/32356, first published
.

1 Department of Emergency Medicine, Stanford University School of Medicine, Palo Alto, CA, US
2 Cornell University College of Engineering, Ithaca, NY, US
3 Stanford University, Palo Alto, CA, US