Figure 3From: Breast cancer research output, 1945-2008: a bibliometric and density-equalizing analysisDensity equalizing calculations, research quality. Illustration of the average number of citations per breast cancer-related item, per country. The size of each country has been scaled in proportion to the average number of citations per item. A colour-coded system shows the average number of citations per item. Threshold excludes countries with <30 items published.Back to article page