Funding for this research was provided by:
UiO Life Science (NA)
Research Council of Norway (284983)
Norwegian Cancer Society (6829007)
South-Eastern Norway Regional Health Authority (2016006)
Received: 16 November 2019
Accepted: 19 May 2020
First Online: 1 June 2020
Ethics approval and consent to participate
: The study was approved by the Regional Committee for Medical Research Ethics (Oslo, Norway) (REC approval no: 2013/624, 2016/2247).
: Not applicable.
: The authors declare that they have no competing interests.