Both, Christian P.
Thomas, Jörg
Bühler, Philipp K.
Schmitz, Achim
Weiss, Markus
Piegeler, Tobias http://orcid.org/0000-0003-1887-8658
Article History
Received: 14 January 2018
Accepted: 20 June 2018
First Online: 18 July 2018
Ethics approval and consent to participate
: Ethical approval was obtained from the local ethics committee (Kantonale Ethikkommission, Zurich, Switzerland; study protocol BASEC number: 2016–00188). The need for written consent was waived for this retrospective study.
: Not applicable.
: The authors declare that they have no competing interests.
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