Funding for this research was provided by:
Västerbotten Läns Landsting (no number)
AFA Försäkring (150274)
Article History
First Online: 31 July 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: This study was approved by the Regional Ethical Review Board in Umeå, Sweden (Approval No. 2015/49-31Ö) and was conducted in accordance with the ethical principles of the Declaration of Helsinki.
: Written informed consent was obtained from all individual participants included in the study.