Funding for this research was provided by:
The County Council of Östergötland, Sweden (LIO-439131)
The Medical Research of Southeast Sweden (FORSS-475291)
Text and Data Mining valid from 2020-03-12
Received: 20 December 2018
Accepted: 13 February 2020
First Online: 12 March 2020
Ethics approval and consent to participate
: The study was approved by the Regional Ethical Review Board in Linköping, Sweden (code 2013/223–31), and was carried out in accordance with the Declaration of Helsinki. Written informed consents were obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.