,
Trezzini, Bruno
Brach, Mirjam
Post, Marcel
Gemperli, Armin
Article History
Received: 9 September 2018
Revised: 11 January 2019
Accepted: 11 January 2019
First Online: 29 January 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study was approved by the ethics committees of the four Swiss cantons with SCI-specialized centers (Lucerne, Zurich, Basel-Stadt and Valais) [].