Funding for this research was provided by:
Forte - Swedish Research Council for Health, Working Life and Welfare (2016-00236)
Text and Data Mining valid from 2019-12-01
Received: 4 June 2019
Accepted: 20 November 2019
First Online: 18 December 2019
Ethics approval and consent to participate
: Participants gave informed consent for the data to be used for research purpose, and the present study was approved by the Regional Ethical Review Board of Umeå (Dnr: 2015/134-31Ö).
: Not applicable.
: The authors declare that they have no competing interests.