Coburger, Jan http://orcid.org/0000-0002-3677-8258
Wirtz, Christian Rainer
Article History
Received: 25 May 2018
Accepted: 13 November 2018
First Online: 28 November 2018
Compliance with ethical standards
:
: The author JC works as a consultant for Brainlab AG, München, Germany and received speaker fees from the same company.