Persett, Per Sverre http://orcid.org/0000-0003-3312-7262
Grimholt, Tine K.
Ekeberg, Oivind
Jacobsen, Dag
Myhren, Hilde
Funding for this research was provided by:
Helse Sør-Øst RHF
Article History
Received: 30 May 2017
Accepted: 11 January 2018
First Online: 24 January 2018
Ethics approval and consent to participate
: The Norwegian Regional Ethics Committee and the Data Protection Officer at Oslo University Hospital approved this study (ref nr: REK: 2010/1487). The patients included to the study signed a written consent. They were given an information leaflet containing the name and phone number of the study coordinator with the possibility of contact during the study.
: Not applicable.
: The authors declare that they have no competing interests.
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