Funding for this research was provided by:
Norwegian Fund for Postgraduate Education in Physiotherapy
Received: 1 March 2019
Accepted: 23 October 2019
First Online: 3 November 2019
Ethics approval and consent to participate
: The Regional Committees for Medical and Health Research Ethics approved the study plan (Reference number: 2014/1634). All participants signed a written informed consent prior to inclusion in the study.
: Not applicable.
: The authors declare that they have no competing interests.