Published on in Vol 6, No 4 (2020): Oct-Dec
Preprints (earlier versions) of this paper are
available at
https://www.medrxiv.org/content/10.1101/2020.06.03.20120113v1, first published
.
1 Department of Physics, University of Oxford, Oxford, United Kingdom
2 Warwick Medical School, University of Warwick, Coventry, United Kingdom