1. Section of Rheumatology, Lewis Katz School of Medicine, Temple University, 201 MOB, 3322 N. Broad Street, Philadelphia, PA 19140, USA
2. Section of Rheumatology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
3. Health Sciences Library, Temple University, Philadelphia, PA, USA
4. The University of Arizona Arthritis Center and Division of Rheumatology, College of Medicine, University of Arizona, Tucson, AZ, USA