1 Department of Medicine, Massachusetts General Hospital, Boston, Mass.
2 Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Boston, Mass.
3 Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Boston, Mass; Harvard Medical School, Boston, Mass.
4 Harvard Medical School, Boston, Mass; Department of Dermatology, Massachusetts General Hospital, Boston, Mass.
5 Division of General Internal Medicine and Primary Care, Department of Medicine, Brigham and Women's Hospital, Boston, Mass.
6 Department of Medicine, Center for Drug Safety and Immunology, Vanderbilt University Medical Center, Nashville, Tenn; Institute for Immunology and Infectious Diseases, Murdoch University, Murdoch, Western Australia, Australia.
7 Harvard Medical School, Boston, Mass; Division of General Internal Medicine and Primary Care, Department of Medicine, Brigham and Women's Hospital, Boston, Mass.
8 Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Boston, Mass; Harvard Medical School, Boston, Mass. Electronic address: kblumenthal@mgh.harvard.edu.