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Article History

Received: 24 May 2018

Accepted: 22 November 2018

First Online: 4 December 2018

Ethics approval and consent to participate

: Ethical approval for this research was granted from the Faculty of Social Sciences and Law Committee for Research Ethics, University of Bristol (ID number 30501). Consent to participate in the study was received in writing for those interviewed in person. For those interviewed by phone, consent to participate was recorded with a digital recorder prior to the interview, as agreed by the ethics committee.

: Not applicable.

: The authors declare that they have no competing interests.

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