Svendsen, B. http://orcid.org/0000-0001-6722-5333
Grytten, N.
Bø, L.
Aarseth, H.
Smedal, T.
Myhr, K-M.
Article History
Received: 24 May 2017
Accepted: 3 April 2018
First Online: 21 April 2018
Compliance with ethical standards
:
: Patients gave written consent. Information was linked to patients via numerical codes. The codes were stored in a separate file at Haukeland University Hospital’s research database. The file with the codes was deleted January 15th 2016. The project was approved by the data protection officer at Haukeland University Hospital. No further approval was required.
: None one of the authors have reported conflict of interest.