Funding for this research was provided by:
Western Norway University of Applied Sciences, Haugesund, Norway. (3103-3050)
Received: 10 May 2019
Accepted: 24 August 2020
First Online: 4 September 2020
Change Date: 5 June 2021
Change Type: Correction
Change Details: A Correction to this paper has been published:
Change Details: https://doi.org/10.1186/s12877-021-02269-9
Ethics approval and consent to participate
: This study was approved by the Inspectorate with the Norwegian Social Science Data Services A/S NSD (No. 29153). The participants were informed orally and in text about the study and signed a form for informed consent.
: Not applicable.
: The authors declare that they have no competing interest.