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Article History

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.

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