Received: 25 September 2019
Accepted: 12 June 2020
First Online: 29 June 2020
Ethics approval and consent to participate
: Ethical approval was not required for this research.
: As this paper does not include any individual’s data, consent for publication was nor required.
: The authors declare that they have no competing interests. AK’s position at the University of Southern Denmark is financially supported by the Foundation for Chiropractic Research and Postgraduate Education. CC’s position at Ontario Tech University and Centre for Disability and Prevention at Ontario Tech University and Canadian Memorial Chiropractic College is financially supported by the Canadian Chiropractic Research Foundation.