Published on in Vol 5 , No 2 (2021) :February
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/21432, first published
.

1 Department of Psychology, University of Iceland, Reykjavik, IS
2 Faculty of Medicine, University of Iceland, Reykjavik, IS
3 Children's Hospital, Landspitali University Hospital, Reykjavik, IS
*all authors contributed equally