1 Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts.
2 Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, California.
3 Harvard Medical School, Boston, Massachusetts; Division of Allergy and Immunology, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts.
4 Harvard Medical School, Boston, Massachusetts; Division of Immunology, Boston Children's Hospital, Boston, Massachusetts.
5 Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts; Department of Emergency Medicine, Massachusetts General Hospital, Boston, Massachusetts. Electronic address: ccamargo@partners.org.