1. Division of Rheumatology and Clinical Immunology, Department of Medicine, University of California, Irvine, CA 92717.
2. Department of Microbiology and Molecular Genetics, University of California, Irvine, CA 92717.
3. Geriatric Research, Education and Clinical Center, Seattle Veterans Hospital Medical Center, and Departments of Medicine and Pharmacology, University of Washington, Seattle, WA 98108.