Text and Data Mining valid from 2020-01-10
Received: 19 September 2019
Accepted: 19 December 2019
First Online: 10 January 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the Regional Ethical Review Board in Stockholm (registration number: 2011/337-31/3). Participation in the SNKLR is voluntary and patients that choose to participate receive written information.
: Not applicable.
: The authors declare that they have no competing interests.