Text and Data Mining valid from 2019-12-01
Received: 19 September 2019
Accepted: 29 November 2019
First Online: 17 December 2019
Ethics approval and consent to participate
: The ethical approval for this study was obtained from Regional Ethical Review Board at Lund University, Lund, Sweden (Dnr 2014/276).Consent to participate: Not applicable
: Not applicable
: The authors declare that they have no competing interest.