1 Division of Pulmonary, Allergy & Critical Care Medicine, Stanford University School of Medicine, Stanford, Calif. Electronic address: annaarroyo@stanford.edu.
2 Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Boston, Mass; Harvard Medical School, Boston, Mass.
3 Department of Emergency Medicine, Massachusetts General Hospital, Boston, Mass.
4 Harvard Medical School, Boston, Mass; Division of Immunology, Boston Children's Hospital, Boston, Mass.
5 Harvard Medical School, Boston, Mass; Department of Emergency Medicine, Massachusetts General Hospital, Boston, Mass.
6 Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Boston, Mass; Harvard Medical School, Boston, Mass; Department of Emergency Medicine, Massachusetts General Hospital, Boston, Mass.