Funding for this research was provided by:
Central Institute for the Association of Statutory Health Insurance.
Received: 9 October 2020
Accepted: 22 March 2021
First Online: 20 April 2021
: Confirmation of the responsible ethics committee that no vote is required. No health-related information was collected.
: Not applicable, no data on individual persons is contained in the manuscript.
: The authors declare that they have no competing interests.