Funding for this research was provided by:
University of Innsbruck and Medical University of Innsbruck
Article History
Received: 19 December 2018
Accepted: 26 February 2019
First Online: 12 March 2019
Conflict of interest
: R. Jäger, R. Weigel, B. Forthuber, and U. Ganswindt declare that they have no competing interests.