Funding for this research was provided by:
Helse Sør-Øst RHF
Text and Data Mining valid from 2019-03-28
Received: 17 November 2018
Accepted: 22 March 2019
First Online: 28 March 2019
Ethics approval and consent to participate
: The Regional Committee for Medical and Health Research Ethics approved the study (REK 2016/170). No consent to participate was required.
: Not applicable.
: The authors declare that they have no competing interests.
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