Funding for this research was provided by:
Erna and Olav Aakre Foundation for Cancer Research (A65285)
Received: 3 December 2020
Accepted: 12 January 2021
First Online: 22 January 2021
Ethical approval and consent to participate
: This study was approved by the Regional Committees for Medical and Health Research Ethics, University of Tromsø—The Arctic University of Norway (REK; reference number 2012/420).
: Not applicable.
: The authors declare that they have no competing interests.