Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (407440_167349)
Received: 18 June 2020
Accepted: 16 December 2020
First Online: 5 January 2021
Ethics approval and consent to participate
: Not applicable, as confirmed by a waiver of the ethics committee (Kantonale Ethikkommission Zürich, dated January 11, 2017).
: Not applicable.
: The authors declare that they have no competing interests. Helsana Group provided support in the form of salaries for authors (CB, BB, EB), but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.