Funding for this research was provided by:
Deutsches Rheuma-Forschungszentrum Berlin (DRFZ) (3438
Received: 10 March 2021
Accepted: 24 June 2021
First Online: 7 July 2021
: Ethical approval was obtained from the Ethics Committee of the Charité — Universitätsmedizin Berlin, Berlin. Participants have to consent to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.