Affiliation: | 1. University of Massachusetts Medical School, Worcester, and Corrona, Southborough, Massachusetts;2. Corrona, Southborough, Massachusetts;3. University of Massachusetts Medical School, Worcester;4. Genentech, South San Francisco, California;5. Albany Medical College and the Center for Rheumatology, Albany, New York;6. Corrona, Southborough, Massachusetts, and New York University School of Medicine, New York |