Published on in Vol 22, No 8 (2020): August
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/15335, first published
.
1 Centre for Physical Activity Research, Rigshospitalet, Copenhagen, Denmark
2 Copenhagen Centre for Cancer and Health, Municipality of Copenhagen, Copenhagen, Denmark
3 Department of Public Health, University of Copenhagen, Copenhagen, Denmark