Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (MA 1236/10-1, DO 1772/1-1, BR 4733/3-1, BR 4733/4-1)
Wilhelm Sander-Stiftung (2016-024.1)
Received: 21 July 2020
Accepted: 2 October 2020
First Online: 21 October 2020
Ethics approval and consent to participate
: All procedures performed in this study were in accordance with the ethical standards of the institutional and national research committees and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.The study was approved by the Ethics Committee of Technical University of Munich (491/17 S), with each participant providing written consent.
: Not applicable.
: The authors declare that they have no competing interests.