Funding for this research was provided by:
Cancerfonden (JCIA 19-0089, PJ 19-0131)
Stockholms Läns Landsting (k0173-2016)
Åke Wiberg Stiftelse (M19-0384)
Received: 23 April 2020
Accepted: 25 May 2020
First Online: 29 May 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The regional ethics committees in Stockholm and Oslo approved the study (2016/392-31 and 2016/684).
: Informed consent was obtained from all individual participants included in the study.