Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (WI 1352/17-2)
ulrich GmbH & Co. KG
Received: 21 December 2020
Revised: 15 January 2021
Accepted: 2 February 2021
First Online: 17 March 2021
Compliance with ethical standards
: The vertebral body replacement implants and posterior stabilisation systems were provided by ulrich GmbH & Co. KG, Ulm, Germany.
: The study was approved by the ethical committee board of the University of Ulm (No. 142/17).