Funding for this research was provided by:
Hans und Ilse Breuer Stiftung
Received: 27 July 2020
Accepted: 10 November 2020
First Online: 23 November 2020
Ethics approval and consent to participate
: This study was performed in line with the principles of the Declaration of Helsinki, revised version from 2000. The Ethics Committee of the Medical Faculty of the University of Leipzig approved this study (Ref: 137/20-ek). Participants were verbally informed about the study at the beginning of the telephone interviews, and then asked to consent, documented by USUMA.
: Not applicable.