Funding for this research was provided by:
Helse Sør-Øst RHF (2014021)
Kreftforeningen (711164, 197884)
Norges Forskningsråd (288404, 187615)
Received: 4 May 2020
Accepted: 26 March 2021
First Online: 29 April 2021
: This study only utilizes data that has been previously published. The research performed here is in compliance with the Helsinki Declaration.
: Not applicable.
: The authors declare that they have no competing interests.