Funding for this research was provided by:
EkstraStiftelsen Helse og Rehabilitering (n.a)
Sørlandet Hospital, Arendal (n.a.)
Text and Data Mining valid from 2019-09-02
Received: 13 June 2019
Accepted: 23 August 2019
First Online: 2 September 2019
Ethics approval and consent to participate
: This study is approved by the Regional committees for medical and health research ethics in South-Eastern Norway Regional Health Authority.
: Not applicable.
: The authors declare that they have no competing interests.