Lange, Nicole
Schleifer, Sophia
Berndt, Maria
Jörger, Ann-Kathrin
Wagner, Arthur
Krieg, Sandro M.
Jordan, Denis
Bretschneider, Martin
Ryang, Yu-Mi
Meyer, Bernhard
Gempt, Jens
Article History
Received: 12 March 2019
Accepted: 25 October 2019
First Online: 11 November 2019
Competing interests
: B.M. received honoraria, consulting fees, and research grants from Medtronic (Meerbusch, Germany), Icotec ag (Altstätten, Switzerland), and Relievant Medsystems Inc., (Sunnyvale, CA, USA), honoraria, and research grants from Ulrich Medical (Ulm, Germany), honoraria and consulting fees from Spineart Deutschland GmbH (Frankfurt, Germany) and DePuy Synthes (West Chester, PA, USA), and royalties from Spineart Deutschland GmbH (Frankfurt, Germany). S.K. is consultant for Nexstim Plc (Helsinki, Finland) and Spineart Deutschland GmbH (Frankfurt, Germany), and received honoraria from Medtronic (Meerbusch, Germany) and Carl Zeiss Meditec (Oberkochen, Germany). S.K. and B.M. received research grants and are consultants for Brainlab A.G. (Munich, Germany).