1 Division of General Internal Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Mass.
2 Division of Allergy and Clinical Immunology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Md.
3 Harvard Medical School, Boston, Mass; Department of Dermatology, Massachusetts General Hospital, Boston, Mass.
4 Center for Drug Safety and Immunology, Departments of Medicine, Dermatology, Pharmacology, Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tenn.
5 Department of Medicine, Massachusetts General Hospital, Boston, Mass.
6 Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Boston, Mass; Department of Medicine, The Mongan Institute, Massachusetts General Hospital, Boston, Mass.
7 Division of General Internal Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass.
8 Division of General Internal Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Mass; Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Boston, Mass; Department of Medicine, The Mongan Institute, Massachusetts General Hospital, Boston, Mass. Electronic address: [email protected].