Received: 18 September 2020
Accepted: 20 December 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: The study was approved by the Regional Committee for Medical and Health Research Ethics, Norway (project 2011/790 REK sør-øst), and by the Data Protection Officer at Akershus University Hospital (project 2012_097). Patients received oral and written information about the project, and only patients giving written consent were included. Refusal to participate had no consequence in the care offers.
: Not applicable.
: Ruud is a member of the editorial board of BMC Health Services Research. Šaltytė Benth and Nyttingnes declare that they have no competing interests.