Funding for this research was provided by:
South-Eastern Norway Regional Health Authority (project number 2014113)
Received: 15 September 2017
Accepted: 12 June 2018
First Online: 25 June 2018
Ethics approval and consent to participate
: The Regional South East Committee for Medical and Health Research Ethics in Norway has approved the study. Inclusions have been based strictly upon informed consent and the patient’s signature.
: Not applicable.
: The authors declare that they have no competing interests.
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