1. Division of Rheumatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA.
2. Division of Rheumatology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
3. Division of Geriatric and Palliative Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA.
4. Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA.
5. Division of Intramural Research, National Heart, Lung and Blood Institute, Bethesda, MD 20892, USA.
6. Michigan Clinical Research Unit, University of Michigan, Ann Arbor, MI 48109, USA.
7. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA.
8. Department of Biological Chemistry, University of Michigan, Ann Arbor, MI 48109, USA.