Article History
Received: 19 December 2018
Accepted: 29 July 2019
First Online: 7 August 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was granted research governance and ethical approval by the Cardiff University Medical School Medical Research Ethics and Conduct panel in December 2016.
: The participants in this study gave their written informed consent to take part in this study and for anonymised findings of this study to be published. All of the authors (RS, EL, KW and AB) have given their consent for the manuscript to be published should it be accepted by the journal.
: Additional data and material is available from the authors on request