Funding for this research was provided by:
Nordic cancer union (184395)
Lion's Cancer Research Foundation in Umeå University (LP 15-2077)
Cancer Research Foundation in Northern Sweden (AMP 16-844)
ALF grants in Västerbotten (VLL-678391)
Received: 22 January 2018
Accepted: 19 November 2018
First Online: 17 December 2018
Ethics approval and consent to participate
: The present study was approved by the ethics committee in Umeå, Sweden (Dnr 2015/57–31 and Dnr 2017–166-32 M).
: Not applicable.
: The authors declare that they have no competing interests.
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