Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (33CS30-177506/1)
Received: 24 September 2019
Accepted: 9 September 2020
First Online: 20 October 2020
Ethics approval and consent to participate
: The SAPALDIA cohort study complied with the Declaration of Helsinki. For each survey, ethics approval was granted by the regional ethics committees and participants provided written informed consent prior to participation.
: Not applicable.
: The authors declare that they have no conflict of interest.