Funding for this research was provided by:
Received: 7 February 2019
Accepted: 16 July 2019
First Online: 25 July 2019
Ethics approval and consent to participate
: Before enrolment of study patients, ethical approval was obtained from the Regional Ethical Review Board at Umeå University (2016/337–31) and the study was registered at ExternalRef removed (NCT02939157). All participants provided written informed consent before enrolment.
: Not applicable.
: The authors declare that they have no competing interests.