Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (DO 1772/1-1, AV 109/4-1)
German Research Foundation (DFG) and the Technical University of Munich (TUM) in the framework of the Open Access Publishing Program
Received: 6 September 2019
Accepted: 28 January 2020
First Online: 7 February 2020
Ethics approval and consent to participate
: The study was approved by the local Ethics Committee (Faculty of Medicine, Technical University Munich, Ismaninger Str. 22, 81675 Muenchen, Germany, ExternalRef removed; project 491/17 S). Written informed consent was obtained from all patients.
: Not applicable
: The authors declare that they have no competing interests.