Received: 21 July 2017
Accepted: 2 May 2018
First Online: 22 May 2018
Ethics approval and consent to participate
: All participants in the study gave oral consent to participate and to publish the results of the study. Due to the participants’ professional status, the study was deemed not to be subject to approval by the Committee of Ethics. According to the Notification Test by The Norwegian Centre for Research Data, the study was not subject to specific notification. This follows from the Personal Data Act of 14 April 2000 No. 31.
: The authors declares that they have no competing interests.
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