Valdec, Silvio
Borm, Jan M.
Casparis, Stephanie
Damerau, Georg
Locher, Michael
Stadlinger, Bernd
Article History
Received: 4 June 2019
Accepted: 30 September 2019
First Online: 15 November 2019
Ethics approval and consent to participate
: The study was approved by the cantonal ethics committee of the canton of Zurich (KEK 2018-01691).
: Not applicable.
: Silvio Valdec, Jan Borm, Stephanie Casparis, Georg Damerau, Michael Locher and Bernd Stadlinger declare that they have no competing interests.