Received: 19 December 2019
Accepted: 2 June 2020
First Online: 8 June 2020
Ethics approval and consent to participate
: Analysis of patient records and data collection took place after being approved by the local ethics committee of the Technical University Munich (TUM), vote number 307/19.The ethics vote for this retrospective analysis is available in writing. No other form of explicit informed consent was necessary.
: The authors declare that they have no competing interests.