Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (Fkz.:16SV7952)
Article History
Received: 21 April 2020
Accepted: 1 September 2020
First Online: 29 September 2020
Ethics approval and consent to participate
: The study protocol was approved by the ethics committee and data protection committee of the Charité – Universitätsmedizin Berlin (No: EA4/055/18). All participants gave their written informed consent to take part in the interviews.
: All authors have approved the manuscript for submission.
: The authors declare that they have no competing interests.