Funding for this research was provided by:
UK Partnership for Conflict, Crime and Security Research (ES/P001327/1)
First Online: 4 June 2019
Compliance with Ethical Standards
: The authors declare they have no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee, and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.