Funding for this research was provided by:
Region Örebro län (OLL-328101)
Text and Data Mining valid from 2019-12-01
Received: 15 November 2019
Accepted: 24 November 2019
First Online: 2 December 2019
Ethics approval and consent to participate
: The study was approved by the Regional research ethics board in Uppsala, Sweden (ID 2013/011). Written informed consent was provided by all participants.
: Not applicable.
: The authors declare that they have no competing interests.