Multimorbidity in patients with low back pain in Danish chiropractic practice: a cohort study.

"Declarations Ethical approval and consent to participateThe Research Ethics Committee for Central Jutland determined that ChiCo did not require ethical approval because of the absence of a study-initiated clinical intervention. (Project-id: S-20162000-109). All participants provided written informed consent prior to enrolment. Consent for publicationNot applicable. Competing interestsJan Hartvigsen is member of the Editorial Board of the Chiropractic and Manual Therapies. Otherwise, the authors declare that they have no other competing interests. Competing interests Jan Hartvigsen is member of the Editorial Board of the Chiropractic and Manual Therapies. Otherwise, the authors declare that they have no other competing interests."

"Funding This work was funded by the Danish Chiropractor Foundation, award number RLTN 5550-16/621 and The Research Council of the Practice Sector in the Municipality Region, Denmark. The funding bodies played no role in the design of the study and collection, analysis, and interpretation of data and in writing the manuscript."