Published on in Vol 22, No 7 (2020): July
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/20912, first published
.
1 Department of Physics, Harvard University, Cambridge, MA, United States
2 Institute of Advanced Computational Science, J.A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States