Funding for this research was provided by:
Else Kröner-Fresenius-Stiftung (2014_A129)
Evangelisches Studienwerk Villigst
Accepted: 31 December 2020
First Online: 23 January 2021
Compliance with Ethical Standards
: All authors declare they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (Würzburg Medical School Ethics Committee (No. 135/15)) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.