Krappinger, Dietmar
Wolf, Bernhard
Dammerer, Dietmar
Thaler, Martin
Schwendinger, Peter
Lindtner, Richard A.
Article History
Received: 4 October 2018
First Online: 7 February 2019
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest. No funding was received for the study.