Funding for this research was provided by:
Forskningsrådet om Hälsa, Arbetsliv och Välfärd
Text and Data Mining valid from 2018-07-03
Received: 18 January 2018
Accepted: 23 May 2018
First Online: 3 July 2018
Ethics approval and consent to participate
: Stockholm regional ethical review board gave ethical approval (2011/636–32). The manuscript does not contain clinical studies or patient data. The anonymized data that was used in this study come from registers and informed consent could therefore not be obtained.
: The authors declare that they have no competing interests.
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