Funding for this research was provided by:
Universitetet i Bergen
Text and Data Mining valid from 2018-05-29
Received: 21 December 2017
Accepted: 21 May 2018
First Online: 29 May 2018
Ethics approval and consent to participate
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000 (5). Informed consent was obtained from all participants for being included in the study. The study protocol was approved by the Regional Committee for Medical and Health Related Ethics, Western Norway (no. 2015/1154).
: Identifiable information and details have been removed from this manuscript to ensure anonymity so that the consent to publish is not applicable.
: The authors declare that they have no conflict of interest.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.