Funding for this research was provided by:
National Institute of Neurological Disorders and Stroke (K23NS104211)
The Danish Chiropractic Fund for Research and Post Graduate Research (R32-A977-B845)
Hospital Lillebaelt – Research counsel
Received: 7 September 2020
Accepted: 16 February 2021
First Online: 24 February 2021
Ethics approval and consent to participate
: All participants gave oral and written informed consent for the study, which was approved by the regional research ethics board (S-20160201).
: Not applicable.
: The authors declare no competing interests.