Nat. Med. 12, 62–66; 2006; published online 5 January 2006; corrected 24 February 2006

In the version of this article initially published, some information about sources was omitted. The citation of the data source for Table 1 should have included a reference to the World Health Organization SuRF 2 Report for the country estimates and the World Health Organization Global InfoBase for Global/Income group estimates. Figures 1 and 2 should have included a reference to Wild et al. (Diabetes Care 27, 1047–1053; 2004). This error has been corrected in the PDF version of the article.