Text and Data Mining valid from 2019-09-14
Received: 28 December 2018
Accepted: 28 August 2019
First Online: 14 September 2019
Ethics approval and consent to participate
: The Regional Ethical Review Board in Lund approved the study (Dnr 2014/12) and the participants provided written informed consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.