Science, medicine, and the future: Tolerance and autoimmunity

A transcription error occurred in figure 2 (p 94) in this article by Ian R Mackay (8 July 2000, pp 93-6). The cytokines released by Th2 T cells to stimulate B cell activation should be interleukin (not interferon) 4, 5, 6, 10, 13 (for correct version see http://bmj.com/cgi/content/full/321/7253/93/F2).