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Article History

Received: 16 August 2017

Accepted: 5 January 2018

First Online: 13 February 2018

Ethics approval and consent to participate

: This survey was conducted through the Danish Chiropractors’ Association. All responses were anonymous and individual chiropractors or their clinics could not be identified by the researchers. According to Danish law, anonymous surveys protect the anonymity of the population and therefore do not require ethical approval.

: Not applicable.

: The authors declare that they have no competing interests.

: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.