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In the article “Determinants of survival in progressive multifocal leukoencephalopathy” by A. Marzocchetti et al. (Neurology® 2009;73:1551–1558), there is an error in the labeling of the y-axis in figures 3 and 4. The y-axis should read “Cumulative probability of survival categorized by the presence of IRIS” in figure 3 and “Cumulative probability of survival categorized by CD4 count at baseline” in figure 4.
