Funding for this research was provided by:
Stockholms Läns Landsting
Text and Data Mining valid from 2019-05-07
Received: 10 December 2018
Accepted: 9 April 2019
First Online: 7 May 2019
Ethics approval and consent to participate
: The project has been reviewed by the Regional Ethical Review Board in Stockholm (Ref no. 2017/2211–31/5) and found not to need any ethical approval. Nevertheless, all participants were treated in accordance with the ethical guidelines. Written informed consent was obtained from all study participants. In the case of refusal, these individuals were not included in the data set used for analyses.
: Not applicable.
: The authors declare that they have no competing interests.
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