Funding for this research was provided by:
Economic and Social Research Council (ES/L003619/1)
Text and Data Mining valid from 2018-06-15
Received: 4 February 2018
Accepted: 4 June 2018
First Online: 15 June 2018
Ethics approval and consent to participate
: Ethical approval was received from both the Ethics Review Committee of University College London and Zhejiang University prior to the field study. All participants provided written informed consent before taking part in this study.
: All participants provided written consent for their anonymized quotes to be published.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.