1. Department of Microbiology and Immunology, Weill Medical College of Cornell University, the
2. Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305
3. Laboratory of Computational Genomics, The Rockefeller University,
4. Affymetrix, Inc., Santa Clara, CA 95051
5. Immunology Program, Weill Graduate School of Medical Sciences of Cornell University, New York, NY 10021