1. Department of Medicine (Division of Clinical Immunology and Rheumatology); Schools of Medicine and Public Health, The University of Alabama at Birmingham, Birmingham, Alabama; 615 Medical Education Building, 1813 6th Avenue South, The University of Alabama at Birmingham, Birmingham, Alabama 35294.
2. Department of Medicine (Division of Rheumatology and Clinical Immunogenetics), The University of Texas-Houston Health Science Center, Houston, Texas
3. Department of Medicine (Division of Clinical Immunology and Rheumatology); Schools of Medicine and Public Health, The University of Alabama at Birmingham, Birmingham, Alabama
4. Department of Medicine (Division of Rheumatology), The University of Texas, Medical Branch at Galveston, Galveston, Texas
5. Department of Medicine Epidemiology, Schools of Medicine and Public Health, The University of Alabama at Birmingham, Birmingham, Alabama
6. Department of Medicine Biostatistics; Schools of Medicine and Public Health, The University of Alabama at Birmingham, Birmingham, Alabama