Funding for this research was provided by:
The study was supported by the Practise Research Foundation of Danish Physiotherapists.
Received: 27 June 2019
Accepted: 10 March 2020
First Online: 23 March 2020
Ethics approval and consent to participate
: All participants signed written informed consent forms and the study was approved by the Danish Data Protection Agency (No. 2012–58-006). Under Danish law this study did not need ethics approval (Act on Research Ethics Review of Health Research Projects, October 2013) [CitationRef removed].
: The authors declare that they have no competing interests.