Funding for this research was provided by:
Forskningsrådet i Sydöstra Sverige (Not applicable)
Research and Development Fund of Region Kronoberg, Växjö, Sweden (not aplicable)
Text and Data Mining valid from 2019-11-21
Received: 26 August 2019
Accepted: 25 October 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: The study was approved by the Regional Ethical Review Board of Linköping University, Linköping (Registration no. M120-07, T89-08). All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.