Funding for this research was provided by:
The Danish Chiropractic Fund for Research and Post Graduate Research (78353/16)
University Hospital of Southern Denmark
Received: 21 May 2020
Accepted: 14 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: All participants gave oral and written informed consent for the study. The trial was approved by the Regional Committees on Health Research Ethics for Southern Denmark (ID: S-20160201) and the Danish Data Protection Agency.
: Not applicable.
: The authors declare no competing interests.