Funding for this research was provided by:
Foundation for Chiropractic Research and Postgraduate Education (. 21927/16)
Received: 28 April 2021
Accepted: 6 September 2021
First Online: 16 September 2021
: All methods were carried out in accordance with relevant guidelines and regulations. The data collection was approved by the Danish Data Protection Agency as part of University of Southern Denmark’s joint registration (Journal no. 2015-57-0008). All patients were informed about the project and their rights and provided informed consent that data would be used for research purposes. According to Danish law, the study did not require research ethics approval (Research Ethical Committee for Region of Southern Denmark journal no. S-20162000-109).
: Not applicable.
: The authors declare that they have no competing interests. AK’s and LH’s positions at University of Southern Denmark are partly funded by the Danish Foundation for Chiropractic Research and Post Graduate Education.