Funding for this research was provided by:
Fonden til fremme af kiropraktisk forskning og postgraduat uddannelse ((Grant no 09/2518))
Migræne og Hovedpineforeningen
Received: 10 August 2020
Accepted: 14 December 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: All parents were required to give written informed consent allowing their child to participate in this study and they were informed orally and in writing that participation in the trial was voluntary and that parents could withdraw their child from the trial at any time with no negative consequences for the child. All participants were treated according to the Declaration of Helsinki [CitationRef removed].The project was approved by the Regional Committee on Health Research Ethics for the Region of Northern Denmark (#N-20150025) and data were handled according to the General Data Protection Regulations [CitationRef removed]. The trial was registered with ClinicalTrials.gov (Identifier: NCT02684916) [CitationRef removed].
: LH, WV and HWC are supported partly by the Foundation for Chiropractic Research and Postgraduate Education; SL, HWC and KBD are in private practice, treating the patients in question. No other relationships or activities that could appear to have influenced the submitted work.