Published on in Vol 7, No 1 (2021): Jan-Mar
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/16785, first published
.

1 Institute for Complementary and Integrative Medicine, University Hospital Zurich and University of Zurich , Zurich , CH
2 Institute for Social Medicine, Epidemiology and Health Economics, Charité, Universitätsmedizin Berlin , Berlin , DE
3 Center for Integrative Medicine, University of Maryland School of Medicine , Baltimore, MD, US