Sophie Ugolini et al. Nature Immunology 2, 430–435 (2001).

In the May issue of Nature Immunology some references and text were printed incorrectly. On page 434, column 2, the last line of paragraph 2 should read: β€œIn particular, it has been shown that KIRs can interact via their ITIMs with phosphatidyl inositol-3 kinase, which in turn activates the anti-apoptotic kinase Akt31.” Also on page 434, column 2, the first line of paragraph 4 should read: β€œIn line with this, IL-2RΞ² cell surface expression on antigen-experienced CD8+ T cells correlates with chronic antigenic exposure32.” In line with these changes, references 28–32 in the reference list should read as follows.