Funding for this research was provided by:
Forskningsr?det om H?lsa, Arbetsliv och V?lf?rd (2015-00699)
Article History
First Online: 14 February 2019
Compliance with Ethical Standards
: The study was approved by the Regional Ethical Review Board in Stockholm (no. 2016/269-31/5).
: The authors declare that they have no conflict of interest.