1. Department of Physical Medicine & Rehabilitation, University of Michigan, Ann Arbor, MI, USA
2. University of Michigan Scleroderma Program, Ann Arbor, MI, USA
3. Division of Rheumatology, University of Michigan, Ann Arbor, MI, USA
4. Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
5. Center for Research to Advance Community Health and Department of Medicine, Long School of Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
6. Departments of Population Health and Internal Medicine, Dell Medical School, University of Texas at Austin, Austin, TX, USA
7. Department of Psychology, College of Sciences, San Diego State University, San Diego, CA, USA