Funding for this research was provided by:
Kræftens Bekæmpelse (52271009-3)
The Region of Southern Denamrk (J.nr 17/3122)
Received: 26 December 2018
Accepted: 15 March 2019
First Online: 21 March 2019
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 (16/13968).
: Not applicable
: The authors declare that they have no competing interests.
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