Funding for this research was provided by:
Liaison Committee between the Central Norway Regional Health Authority (RHA) and the Norwegian University of Science and Technology
Received: 14 July 2017
Accepted: 3 November 2017
First Online: 18 January 2018
Ethics approval and consent to participate
: All participants provided written informed consent for continued use of data and biomaterial, which was documented at the first study visit. The study, including the consent procedure, has been reviewed and approved by the Central Norway Regional Committee for Medical and Health Sciences Research Ethics (REK Midt 2010/1449–5).
: The authors declare that they have no competing interests.
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