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Article History

Received: 26 March 2018

Accepted: 5 July 2018

First Online: 16 July 2018

Ethics approval and consent to participate

: Approval for the study was granted by the local research ethics committee in accordance with the Helsinki Declaration (2013) [CitationRef removed].

: Survey instructions informed participants of the details of the research study, completion and submission implied consent.

: David Clark, Mike Lambert and Angus Hunter declare that they have no competing interests.

: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.