Funding for this research was provided by:
Stockholms Läns Landsting
Text and Data Mining valid from 2018-06-12
Received: 28 December 2017
Accepted: 15 May 2018
First Online: 12 June 2018
Ethics approval and consent to participate
: Patients who decline being included in research when they are registered in the Stepwise database are removed prior to analysis. Ethical approval was granted by the regional review board (No. 2009/1298-31/1, EPN Stockholm).
: The authors declare that they have no competing interests.
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