Sollmann, Nico
Zhang, Haosu
Schramm, Severin
Ille, Sebastian
Negwer, Chiara
Kreiser, Kornelia
Meyer, Bernhard
Krieg, Sandro M.
Article History
Received: 24 September 2018
Accepted: 22 November 2018
First Online: 5 December 2018
Compliance with ethical guidelines
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: N. Sollmann received fees from Nexstim Plc (Helsinki, Finland). S.M. Krieg is consultant for Nexstim Plc (Helsinki, Finland) and received fees from Medtronic (Meerbusch, Germany) and Carl Zeiss Meditec (Oberkochen, Germany). S.M. Krieg and B. Meyer received research grants and are consultants for Brainlab AG (Munich, Germany). B. Meyer received fees, consulting fees, and research grants from Medtronic (Meerbusch, Germany), Icotec ag (Altstätten, Switzerland), and Relievant Medsystems (Sunnyvale, CA, USA), fees and research grants from Ulrich Medical (Ulm, Germany), fees and consulting fees from Spineart Deutschland GmbH (Frankfurt, Germany) and DePuy Synthes (West Chester, PA, USA), and royalties from Spineart Deutschland GmbH (Frankfurt, Germany). N. Sollmann, H. Zhang, S. Schramm, S. Ille, C. Negwer, K. Kreiser, B. Meyer and S.M. Krieg declare that they have no conflict of interest regarding the materials used or the results presented in this study.
: All procedures performed in studies 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 its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.