Funding for this research was provided by:
Engineering and Physical Sciences Research Council (EP/G03723X/1)
Received: 4 March 2019
Accepted: 25 June 2019
First Online: 26 July 2019
Ethics approval and consent to participate
: Before the study was carried out, full ethical approval was obtained from the research ethics committee at Queen Mary University, London. Participants took part voluntarily and were able to leave the study at any time. Whilst taking part in the study, participants were allowed to skip any questions that they didn’t feel comfortable in answering. Before the study started participants read an information sheet and were required to give their consent to take part in the study. The information that the participants provided was anonymous and was treated with true confidentiality.
: The authors declare that they have no competing interests.