Funding
Headache, Migraine
MIGRAINE
This research was primarily funded by the Foundation for Chiropractic Research and Postgraduate Education (Grant no 09/2518). The Danish Migraine and Headache Society also made a financial contribution. The funding bodies did not have any influence on the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the article for publication.