Funding for this research was provided by:
Forskningsrådet om Hälsa, Arbetsliv och Välfärd (2016-07115)
Received: 29 January 2019
Accepted: 9 April 2019
First Online: 23 April 2019
Ethics approval and consent to participate
: This study was approved by the regional ethics committee in Stockholm (Regionala Etikprövningsnämnden i Stockholm, EPN) (permit numbers Dnr 2011/136–31/5 and Dnr 2015/1917–32). The board waived the need for individual consent.
: Not applicable.
: The Authors declare that there is no conflict of interest.
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