Kneis, Sarah
Bruetsch, Verena
Dalin, Daniela
Hubbe, Ulrich
Maurer, Christoph
Article History
Received: 23 October 2018
Accepted: 6 March 2019
First Online: 1 May 2019
Ethics approval and consent to participate
: Ethics approval was granted by the Ethics Committee of the University of Freiburg (256/01). Each patient had to sign written informed consent prior to inclusion.
: Not applicable.
: The authors have no competing interests to declare.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.