Funding for this research was provided by:
Medizinische Universität Graz
Text and Data Mining valid from 2020-01-15
Received: 29 August 2019
Accepted: 3 December 2019
First Online: 15 January 2020
Compliance with ethical guidelines
: S.M. Vasicek, P. Pondorfer, C. Holzmeister, M. Graupp, T. Weiland, A. Wolf, U. Moser, D. Wild, and D. Thurnher declare that they have no competing interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1975 Helsinki declaration and its later amendments or comparable ethical standards.