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Article History

Received: 21 December 2018

Accepted: 8 May 2019

First Online: 24 July 2019

Authors’ information

: The authors are members of the World Federation of Chiropractic Disability and Rehabilitation Committee (WFC-DRC) and the presented work was undertaken on a mandate of WFC-DRC. The committee was formed by the World Federation of Chiropractic in response to a recognized need for expert input to inform its work.

: The Regional Ethics Committee of Southern Denmark gave approval for the study (#S-20192000-13) and declared that the study does not fall within the scope of the Medical Research Involving Human Subject Act (§14, paragraph 1) [CitationRef removed]. Approval for data handling and storage was granted by the Research and Innovation Office at the University of Southern Denmark (#10.212). Data processing and storage was conducted in accordance with the European Union Data Protection Regulation (EU GDPR) [CitationRef removed]. The data were originally collected for administrative purposes, and the participants did not sign informed consent for the purpose of this research project. Participants’ consent to participate is not required under the EU GDPR, as the project did not involve personal data.

: Not applicable. The manuscript does not include details, images or videos relating to an individual person.

: MJS is a society representative of Chiropractic and Manual Therapies, and PTu is a member of the editorial board, but neither had any influence over the review assignment or process. The authors declare that they have no further competing interests.

: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.