| Affiliation: | (1) Division of Rheumatology, Department of Medicine, Mayo Clinic College of Medicine, 200 1st Street SW, 55905 Rochester, MN, USA;(2) Division of Biostatistics, Department of Health Sciences Research, Mayo Clinic College of Medicine, 200 1st Street SW, 55905 Rochester, MN, USA;(3) Department of Medicine and Division of Rheumatology, University of Pittsburgh Medical Center, 200 Lothrop Street, 15213 Pittsburgh, PA, USA;(4) Division of Anatomic Pathology, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, 200 1st Street SW, 55905 Rochester, MN, USA |
