Article History
Received: 1 August 2019
Accepted: 19 November 2019
First Online: 28 January 2020
Compliance with ethical standards
:
: Drs. Elias Karakas, Günther Klein and Stefan Schopf have no conflicts of interest or financial ties to disclose.
: All procedures performed in this study 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 ist later amendments or comparable ethical standards.
: Informed cansent was obtained from all individual participants included in the study.