1. Department of Microbiology and Immunology, Weill Medical College and Graduate Programs in
2. Molecular Biology, Weill Graduate School of Medical Sciences, Cornell University, New York, NY 10021
3. Department of Medicine, Division of Infectious Diseases and Geographic Medicine, Stanford Medical School
4. Department of Medical Microbiology, St. George's Hospital Medical School, London SW17 ORE, United Kingdom
5. Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of California, San Francisco, CA 94143
6. Department of Health Research and Policy, Stanford University, Stanford, CA 94305
7. Immunology, Weill Graduate School of Medical Sciences, Cornell University, New York, NY 10021