Received: 19 May 2017
Accepted: 16 March 2018
First Online: 27 March 2018
Ethics approval and consent to participate
: Permission to conduct the study was obtained from Regional Committees for Medical and Health Research Ethics in Norway (Ethics Reference Number 2015/386) REK nord). Signed informed consent was obtained from each participant before they participated in the study. Participants were informed of their rights to withdraw from the study at any time. Anonymity of participants was maintained and assurance given that all information would be treated in absolute confidence. Participants were also provided with written information sheet on the study and their rights regarding participation and the option of withdrawing at any time.
: Not applicable
: The authors declare that they have no competing interests.
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