Funding for this research was provided by:
Danish Working Environment Research Fund (20185100786)
Received: 22 October 2019
Accepted: 9 December 2019
First Online: 27 December 2019
Ethics approval and consent to participate
: According to Danish legislation, scientific questionnaire studies are not required to attain approval by official Danish ethical or scientific committees nor to obtain informed consent from study participants. Nevertheless, all questionnaires and text messages will be handled anonymously. A data manager at the research centre will store the data on a secure drive and de-identify the data before the researcher get access to these. All physiological measurements (pressure pain threshold, maximal trunk extensor strength, systemic blood pressure) have been approved by The Danish National Committee on Biomedical Research Ethics (journal number: H-3-2010-062), and the project is registered at the Danish Data Protection Agency. Prior to giving their informed consent, all participants participating in the physiological measurements will be informed orally and in writing about the objectives and content of the study, as well as of their rights and potential risks of the study in accordance with the Helsinki Declaration.
: Not applicable.
: The authors declare that they have no competing interests.