Funding for this research was provided by:
Svenska Forskningsrådet Formas (K2014-99X-20,067-09-4.)
Text and Data Mining valid from 2019-12-01
Received: 27 February 2019
Accepted: 29 November 2019
First Online: 17 December 2019
Ethics approval and consent to participate
: This study followed guidelines of the Helsinki Declaration (2008 revision) and was approved by the Regional Ethical Review Board at Lund University, Reg. No. 2012/70. All prospective participants were invited and received oral and written information from the gatekeeper and research assistants. Signed consent was obtained for all participants in this study.
: Not applicable for this article.
: The authors declare that they have no competing interests.