RT Journal Article SR Electronic T1 IN THIS ISSUE JF The Journal of Immunology JO J. Immunol. FD American Association of Immunologists SP 3941 OP 3942 DO 10.4049/jimmunol.0990017 VO 182 IS 7 YR 2009 UL http://www.jimmunol.org/content/182/7/3941.abstract