Attinger, Marc C.
Haefeli, Pascal C.
Bäcker, Henrik C.
Flueckiger, Remy
Ballmer, Peter M.
Siebenrock, Klaus A.
Klenke, Frank M. http://orcid.org/0000-0002-7115-5048
Article History
Received: 20 November 2018
Accepted: 26 December 2018
First Online: 20 January 2019
Compliance with ethical standards
: The ethical committee of the canton of Bern, Switzerland approved the study (Ref.-No. KEK-BE: 265/2014).
: The authors declare that they have no conflicts of interest.