Funding for this research was provided by:
Royal Centre for Defence Medicine (N/A)
Received: 25 June 2019
Accepted: 7 October 2019
First Online: 6 November 2019
Compliance with ethical standards
: Ethical approval was granted by Cranfield University for this work and the previous experiments leading up to this work.
: The authors declare that they have no conflicts of interest.
: Informed consent is not applicable as the work does not involve human subjects and the targets are inanimate objects.