Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (Grant KO-1753/13)
Received: 15 June 2020
Accepted: 9 October 2020
First Online: 20 November 2020
Ethics approval and consent to participate
: The study was conducted in accordance with the ethical standards of the Declaration of Helsinki and was approved by the Ethics Committee of the Faculty of Medicine, University of Tübingen. The patients and their legal representatives were informed about the study content before study enrollment and gave their written consent.
: Not applicable.
: The authors declare that they have no competing interests.