Text and Data Mining valid from 2019-08-02
Received: 29 December 2018
Accepted: 24 July 2019
First Online: 2 August 2019
Ethics approval and consent to participate
: The study was based on the principles stated in the Declaration of Helsinki, on anonymity, written, informed consent and the right to withdraw without any negative consequences [CitationRef removed]. In Norway, the Regional Committees for Medical and Health Research Ethics (REC) are responsible for approving medical and health related research projects. When patient data is not involved in the project, we do not need approval from REC to perform the study [CitationRef removed]. However, approval from local data protection officials at Oslo University Hospital (reference number 2012/9029) was obtained to be able to interview staff.
: Not applicable.
: The authors declare that they have no competing interests.