Funding for this research was provided by:
Helse Vest (912009, 912143)
Text and Data Mining valid from 2019-01-05
Received: 9 August 2018
Accepted: 6 December 2018
First Online: 5 January 2019
Ethics approval and consent to participate
: The study was performed according to the Helsinki Declaration and the patients had given their written informed consent. Approval of the project was obtained from the Regional Ethical Committee of Western Norway (REK Vest 2013/1772).
: Not applicable.
: The authors declare that they have no competing interests.
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