Funding for this research was provided by:
The Research and Development Fund of Region Kronoberg, Växjö, Sweden
The Research Council of South Eastern Sweden (FORSS), Linköping, Sweden
Text and Data Mining valid from 2019-10-30
Received: 18 June 2019
Accepted: 3 October 2019
First Online: 30 October 2019
Ethics approval and consent to participate
: The study was performed in accordance with the Declaration of Helsinki, and 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.