This article refers to:
Swann, G. (2016) Necessity – the Mother of Invention. Journal of Visual Communication in Medicine.
http://dx.doi.org/10.1080/17453054.2016.1182141
When the above article was first published online, it contained another article “‘The Box’ – a skiagraphic approach to recording shape and size” within it in error. This has now been removed and published online separately. You will find the article here: http://dx.doi.org/10.1080/17453054.2016.1203092