1 Division of Pulmonary, Allergy & Critical Care Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, Calif.
2 Division of Allergy/Immunology, Palo Alto Medical Foundation, Mountain View, Calif.
3 Division of Allergy, Immunology and Rheumatology, Department of Pediatrics, Stanford University School of Medicine, Stanford, Calif; Division of Infectious Diseases and Geographic Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, Calif.
4 Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Boston, Mass; Department of Medicine and Emergency Medicine, Harvard Medical School, Boston, Mass; Department of Emergency Medicine, Massachusetts General Hospital, Boston, Mass.
5 Division of Pulmonary, Allergy & Critical Care Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, Calif. Electronic address: annaarroyo@stanford.edu.