1 Division of Allergy, Immunology and Rheumatology, Department of Pediatrics, University of California Davis, School of Medicine, Sacramento, Calif. Electronic address: aphnguyen@ucdavis.edu.
2 Alameda Centre Physicians, Alameda, Calif; Division of Rheumatology, Allergy, and Clinical Immunology, Department of Internal Medicine, University of California Davis, School of Medicine, Sacramento, Calif.
3 Division of Rheumatology, Allergy, and Clinical Immunology, Department of Internal Medicine, University of California Davis, School of Medicine, Sacramento, Calif; Veterans Affairs Northern California Healthcare System, Mather, Calif.