Funding for this research was provided by:
Roland Ernst Stiftung
Received: 19 March 2020
Accepted: 30 June 2020
First Online: 9 July 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the Medical Faculty of the University of Leipzig (446/16-ek). All study procedures were conducted in accordance with the Helsinki Declaration and its later amendments or comparable ethical standards. Written informed consent was obtained from all study participants.
: Not applicable.
: The authors declare that they have no conflict of interest.