Funding for this research was provided by:
Medizinischen Fakultät, Eberhard Karls Universität Tübingen (grant number 2572-0-0)
Received: 15 February 2021
Accepted: 18 February 2021
First Online: 1 March 2021
Ethics approval and consent to participate
: The study was approved by the Clinical Ethics Committee of the University of Tübingen (Project number: 336/2017BO2 + amendments).
: Not applicable.
: The authors declare that they have no competing interests.