Mehliß, Volkmar
Strauch Leira, Marco http://orcid.org/0000-0002-1325-9682
Serrano Olaizola, Agustín
Scior, Wolfgang
Graichen, Heiko
Article History
Received: 22 December 2017
Accepted: 15 May 2018
First Online: 22 May 2018
Compliance with ethical standards
:
: Dr. Graichen reports personal fees from Brainlab, personal fees from DePuy, outside the submitted work. Dr. Strauch reports personal fees from DePuy Johnson & Johnson, personal fees from Brainlab, outside the submitted work. The other authors have nothing to disclose.
: Ethical approval was granted by the responsible German and Spanish ethics committee.
: Patients were informed and they consented to conduct the study.