Funding for this research was provided by:
Forskningsrådet om Hälsa, Arbetsliv och Välfärd (2016-07115)
Text and Data Mining valid from 2020-03-20
Received: 24 July 2019
Accepted: 6 February 2020
First Online: 20 March 2020
Ethics approval and consent to participate
: This study was approved by the regional ethics committee in Stockholm (permit numbers Dnr 2011/136-31/5 and Dnr 2015/1917-32). The board waived the need for patient consent.
: Not applicable.
: The authors declare that they have no competing interests.