On page 4014 in the 12 December 2013 issue, there is an error in the reference citations. The genetically inactivated interleukin-2 receptor γ chain (common γ chain) allele used to generate the triple knockout (TKO) mice was incorrectly attributed to DiSanto et al1 in references 23-25, which are cited in “Materials and methods.”2-4 The allele used to generate the TKO mice was actually obtained from Dr Kazuo Sugamura’s laboratory.5

1. DiSanto JP, Müller W, Guy-Grand D, Fischer A, Rajewsky K. Lymphoid development in mice with a targeted deletion of the interleukin 2 receptor gamma chain. Proc Natl Acad Sci USA. 1995;92(2):377-381.

2. Mazurier F, Fontanellas A, Salesse S, et al. A novel immunodeficient mouse model—RAG2 x common cytokine receptor gamma chain double mutants—requiring exogenous cytokine administration for human hematopoietic stem cell engraftment. J Interferon Cytokine Res. 1999;19(5):533-541.

3. Goldman JP, Blundell MP, Lopes L, Kinnon C, Di Santo JP, Thrasher AJ. Enhanced human cell engraftment in mice deficient in RAG2 and the common cytokine receptor gamma chain. Br J Haematol. 1998;103(2):335-342.

4. Garcia S, DiSanto J, Stockinger B. Following the development of a CD4 T cell response in vivo: from activation to memory formation. Immunity. 1999;11(2):163-171.

5. Ohbo K, Suda T, Hashiyama M, et al. Modulation of hematopoiesis in mice with a truncated mutant of the interleukin-2 receptor gamma chain. Blood. 1996;87(3):956-967.

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