Text and Data Mining valid from 2019-11-08
Received: 8 August 2019
Accepted: 28 October 2019
First Online: 8 November 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The local ethical committee approved this study (Zurich Cantonal Ethics Commission, 2018-02242).
: All patients gave their informed consent for their participation in and the publication of this study.