Funding for this research was provided by:
The Association of Danish Physiotherapists (N/A)
Copenhagen University Hospital, Bispebjerg and Frederiksberg (N/A)
The Danish Council for Independent Research, Medical Sciences (10-093704)
Received: 5 April 2019
Accepted: 30 September 2019
First Online: 27 October 2019
Ethics approval and consent to participate
: The study was approved by the Regional Health Research Ethics Committee of The Capital Region of Denmark (H-2-2011-159) and was conducted in accordance with the Helsinki Declaration. Prior to inclusion all participants gave written informed consent to participate.
: Not applicable.
: MB is chairman of the medical and scientific board, Image Analysis Ltd., London, UK and has stock options. He has received fees/honoraria (<$10,000) covering travel/accommodation costs as well as a small yearly honorarium. All other authors have nothing to declare.RR and JDN: Consultants for Image Analysis Ltd. (analyses of MRIs and conventional radiographs).