1. Harvard-Thorndike Laboratory, Division of Allergy and Inflammation, and the Division of Infectious Disease, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02215
2. Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
3. Department of Medical Microbiology and the Department of Immunology, University of Aarhus, Aarhus 8000, Denmark