1. Division of Rheumatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.
2. Division of Nephrology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.
3. Department of Rheumatology and Immunology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
4. Division of Rheumatology, Department of Medicine, University of Wisconsin–Madison, Madison, WI, USA.
5. William S. Middleton Memorial Veterans Hospital, Madison, WI, USA.
6. Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, USA.