1. Lady Davis Institute, Jewish General Hospital, McGill University, Montreal, Canada.
2. Istituto Pasteur–Fondazione Cenci Bolognetti, Rome, Italy.
3. Department of Microbiology and Molecular Genetics, University of Pittsburgh, Pittsburgh, Pennsylvania.
4. Department of Medicine, Washington University School of Medicine, St. Louis, Missouri.
5. Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri.
6. Department of Pathology and Immunology, The Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, Missouri.