Funding for this research was provided by:
AFA Insurance, Sweden (12169)
Received: 9 May 2019
Accepted: 23 September 2019
First Online: 4 November 2019
Ethics approval and consent to participate
: The study was approved by the Regional Ethical Review Board, Uppsala, Sweden, Dnr 2015/385. Participants provided written informed consent prior to participation.
: Not applicable.
: The authors declare that they have no competing interests.