Funding for this research was provided by:
Paritätischer Wohlfahrtsverband Landesverband Berlin e.V.
Received: 21 October 2020
Accepted: 15 February 2021
First Online: 6 March 2021
Ethics approval and consent to participate
: Ethical approval was obtained by the ethics committee of the Charité – Universitätsmedizin Berlin (EA1/058/20).
: Not applicable.
: The authors declare that they have no competing interests.