1 Department of Emergency Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts.
2 Division of Pediatric Pulmonology, Department of Pediatrics, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts.
3 Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts.
4 Division of Rheumatology, Allergy and Clinical Immunology, Department of Internal Medicine, University of California-Davis Medical Center, Davis, California.
5 Novartis Pharmaceuticals, East Hanover, New Jersey.
6 Department of Emergency Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts; Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts. Electronic address: ccarmargo@partners.org.