Kopp, J.
Kopp, D.
Bernhardt, E.
Manka, L.
Beck, A.
Gerullis, H.
Karakiewicz, P.
Schoerner, W.
Hammerer, P.
Schiffmann, Jonas
Article History
Received: 22 November 2019
Accepted: 7 February 2020
First Online: 26 February 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study has been performed in accordance with the ethical standards as laid down in the Declaration of Helsinki and its ethical standards.