Funding for this research was provided by:
Kræftens Bekæmpelse (R131-A8487)
Received: 3 March 2020
Accepted: 17 June 2020
First Online: 19 July 2020
Ethics approval and consent to participate
: According to Danish law, approval from the ethical committee was not required, but the study was registered with the Danish Data Protection Agency (1–16–02-60-17). All study participants have signed written consent forms.
: Not applicable.
: The authors declare that they have no competing interests.