Funding for this research was provided by:
Norwegian Directorate of Health and the Norwegian Directorate of Labor and Welfare
Received: 21 January 2020
Accepted: 8 October 2020
First Online: 30 October 2020
Ethics approval and consent to participate
: The study complied with the Helsinki Declaration. The process evaluation was part of an outcome evaluation, described in a published protocol [CitationRef removed], which was approved by the Norwegian Social Science Data Services (project no. 34989, approved on 4 October 2013). Written informed consent was obtained from all patients included in the study. Service providers received written information, and verbal consent was given (verbal consent was sufficient at the time as no personal or identifying information was collected).
: Not applicable.
: The authors declare that they have no competing interests.