Published on in Vol 6, No 2 (2020): Apr-Jun
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/18717, first published
.
1 Department of Preventive Medicine, Lozano Blesa University Clinical Hospital of Zaragoza, Zaragoza, Spain
2 Department of Preventive Medicine, Miguel Servet University Hospital of Zaragoza, Zaragoza, Spain