1. Department of Microbiology and Immunology,
2. Department of Medicine,
3. Department of Pathology, and
4. Department of Biostatistics, Medical College of Wisconsin, Milwaukee, WI;
5. Department of Medicine, University of North Carolina, Chapel Hill, NC;
6. Department of Medicine, University of Chicago, Chicago, IL;
7. Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO; and
8. Department of Physiology, National University of Singapore, Singapore