Text and Data Mining valid from 2019-11-19
Received: 10 January 2019
Accepted: 18 October 2019
First Online: 19 November 2019
Ethics approval and consent to participate
: Data was routinely collected as part of a treatment quality program. The further use of the clinical data was authorized by the competent ethics committee of Zurich, Switzerland [KEK-ZH BASEC-Nr. 2017–01766].
: Not applicable.
: The authors declare that they have no competing interests.