Knoepfel, Adrian http://orcid.org/0000-0002-9836-9185
Pfeifer, Roman http://orcid.org/0000-0001-8785-8103
Lefering, Rolf http://orcid.org/0000-0002-0141-1747
Pape, Hans-Christoph http://orcid.org/0000-0002-2059-4980
,
Article History
Received: 15 March 2020
Accepted: 16 July 2020
First Online: 26 July 2020
Compliance with ethical standards
:
: The author(s) declare that they have no competing interests