1. Department of Medicine, Division of Rheumatology and Immunology, University of North Carolina at Chapel Hill, School of Medicine, Chapel Hill, NC, USA,
2. Department of Medicine, Division of Rheumatology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
3. Department of Medicine, Division of Rheumatology, SUNY, Downstate Medical Center, Brooklyn, NY, USA