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Article History

Received: 27 September 2018

Accepted: 12 April 2019

First Online: 9 May 2019

Ethics approval and consent to participate

: The data collection has obtained authorisation from the Danish Data Protection Agency (DPA) as part of the University of Southern Denmark’s institutional authorisation (DPA no. 2015-57-0008 SDU no. 17/30591). When registered by the clinician, the patient receives an email with a link to a patient-reported survey. Written information about the study, data protection, and participants’ rights are in the survey with a request to confirm consent for using data for research purposes. The Regional Committees on Health Research Ethics for Southern Denmark decided that the study did not need ethical approval (file number S-20172000-93) (Additional file InternalRef removed). According to Danish regulations, an observational study implementing a non-experimental treatment that was offered to patients on the decision of the clinicians does not undergo research ethics evaluation [CitationRef removed].

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: AK’s position at the University of Southern Denmark is financially supported by the Foundation for Chiropractic Research and Postgraduate Education, and IR’s position is supported by income from the GLA:D Back clinician courses. GLA:D® is a non-profit initiative hosted at the University of Southern Denmark, and the GLA:D® trademark is a property of the University of Southern Denmark. The GLA:D initiative is developed in close collaboration with the SDU Research & Innovation Organisation, including legal reviews. The researchers do not have any personal financial benefits from working with the project.

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