[1] NIAID, Lab Syst Biol, NIH, Bethesda, MD 20892 USA
[2] NIAID, Immunol Lab, NIH, Bethesda, MD 20892 USA
[3] NCI, Cellular & Mol Biol Lab, NIH, Bethesda, MD 20892 USA
[4] NHLBI, Lab Mol Immunol, NIH, Bethesda, MD 20892 USA
[5] NHLBI, Ctr Immunol, NIH, Bethesda, MD 20892 USA