Article History
Received: 1 November 2017
Accepted: 14 February 2018
First Online: 27 February 2018
Authors’ information
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: Institutional ethics approval for this review was granted by the Health and Wellbeing Faculty Research Ethics Committee at Sheffield Hallam University (Ref No HWB-2017-18-S&E-03). Consent to participate is not applicable.
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: The authors declare that they have no competing interests.
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