Rickman, John M. http://orcid.org/0000-0002-1188-8805
Shackel, James
Article History
Received: 9 April 2018
Accepted: 10 October 2018
First Online: 18 October 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was approved by the ethics committee of Cranfield University.