Further reading
Van Epps, H. (2006) ‘Influenza: exposing the true killer’ [online], Journal of Experimental Medicine, vol. 3, no. 4, p. 803, http://www.ncbi.nlm.nih.gov/ pmc/ articles/ PMC2118275/ [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] (accessed 24 November 2011), doi: 10.1084/jem.2034fta.