1. Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Boston
2. Medical Practice Evaluation Center, Massachusetts General Hospital, Boston
3. Edward P. Lawrence Center for Quality and Safety, Massachusetts General Hospital, Boston
4. Harvard Medical School, Boston
5. Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital, Boston
6. Infection Control Unit, Massachusetts General Hospital, Boston
7. Biostatistics Center, Massachusetts General Hospital, Boston
8. Acadia Allergy and Immunology, Department of Medicine, University of South Carolina School of Medicine, Greenville, South Carolina