Funding for this research was provided by:
Swedish Society of Spinal Surgeons (2012)
Thuréus Grant for Geriatric Research (2014)
Text and Data Mining valid from 2018-08-22
Received: 2 November 2017
Accepted: 16 May 2018
First Online: 22 August 2018
: CO is board member of the Cervical Spine Research Society – Europe.
: This protocol was approved by the Uppsala Regional Ethics Committee on 23 March 2011 (no. 2011/068).
: We include the consent for publication in the informed consent for study participation, which is obtained at the time of enrolment from every patient.
: AR, YR and CO have given paid lectures to physician training courses organised by Medtronic Inc. (Dublin, Ireland) and DePuy Synthes (Johnson & Johnson, Zuchwil, Switzerland).
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.