Kastl, Gregor
Article History
Received: 18 December 2017
Accepted: 25 April 2018
First Online: 17 May 2018
Compliance with ethical guidelines
:
: G. Kastl declares that he has 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 1964 Helsinki declaration and its later amendments or comparable ethical standards.