Funding for this research was provided by:
Helse Sør-Øst RHF (2013126)
Received: 8 December 2020
Accepted: 19 January 2021
First Online: 9 February 2021
Ethics approval and consent to participate
: The study follows the principles stated in the Declaration of Helsinki (1964, 2013) [CitationRef removed]. The participants will receive the standard professional health care at both clinics, and to the best of our knowledge, there are no risks associated with participation in the study. The participants will sign a written informed consent form and will be free to withdraw their consent at any time. The Regional Committee for Medical and Health Research Ethics in Western Norway approved this study (No.: 2011/934). The trial is registered in the ISRCTN registry (No.: 12033424).
: The authors declare that they have no competing interests. None of the authors are involved in the rehabilitation of the participants, but ME and CJ have scientific positions in the same organization as the inpatient clinic, but in separate units. The research project is partly funded by the South-Eastern Norway Regional Health Authority, KLP (a municipal life insurance company in Norway), and the National Centre for Occupational Rehabilitation in Norway.