Funding for this research was provided by:
University of Innsbruck and Medical University of Innsbruck
Text and Data Mining valid from 2018-12-14
Received: 9 July 2018
Accepted: 27 November 2018
First Online: 14 December 2018
Compliance with ethical guidelines
: M. Kafka, P. Rehder, H. Maier, and W. Horninger declare that they have no competing interests.
: A written consent for publication was received.