1 Department of Pediatric Rheumatology, Seattle Children's Hospital, University of Washington, Seattle, Washington.
2 Juvenile Myositis Pathogenesis and Therapeutics Unit, Pediatric Translational Research Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland.
3 Translational Immunology Section, Office of Science and Technology, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland.
4 Environmental Autoimmunity Group, Clinical Research Branch, National Institute of Environmental Health Sciences (NIEHS), National Institutes of Health, Bethesda, Maryland.
5 Dr. George Martin Dermatology Associates, Kihei, Hawaii.