Funding for this research was provided by:
Skåne County Council's Research and Development Foundation (-)
Text and Data Mining valid from 2020-01-09
Received: 20 September 2019
Accepted: 27 December 2019
First Online: 9 January 2020
Ethics approval and consent to participate
: The study has been subjected to ethical review and was approved by the Regional Ethical Review Board in Lund (case no. 2014/547; 2015/369 and 2016/771).
: Not applicable.
: The authors declare that they have no competing interests.