Funding for this research was provided by:
The Norwegian Fund for Post-Graduate Training in Physiotherapy (74865)
Received: 21 November 2017
Accepted: 26 April 2018
First Online: 15 May 2018
Ethics approval and consent to participate
: The study was approved by the ethics review board, Norwegian Social Science Data Services, no. 30651. Each participant signed the consent form. They were given written and oral information and could ask questions. They knew they could withdraw from the project at any time.
: All the participants gave their consent to publish the results as well as the characteristics in the Table InternalRef removed.
: The authors report no competing interests. The authors alone are responsible for the content and writing of the paper.
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