Text and Data Mining valid from 2020-01-07
Received: 17 April 2019
Accepted: 23 December 2019
First Online: 7 January 2020
Ethics approval and consent to participate
: The ethics committee of the Medical Faculty of Ludwig Maximilian University Munich waived the need for ethical assessment. The Bavarian Agency of Quality Assurance granted approval for the use of anonymised performance data from quality indicator programs in Bavarian hospitals for this research project.
: Not applicable.
: The authors declare that they have no competing interests.