1. Division of Rheumatology, Department of Internal Medicine, University of Michigan Scleroderma Program, Ann Arbor, Michigan
2. Department of Medicine, David Geffen School of Medicine at UCLA, University of California Los Angeles, Los Angeles, California
3. University College London Centre for Rheumatology and Connective Tissue Diseases, Royal Free Hospital, London, United Kingdom
4. Interstitial Lung Disease Unit and
5. National Institute for Health Research Clinical Research Facility, Royal Brompton Hospital, London, United Kingdom
6. National Heart and Lung Institute, Imperial College London, London, United Kingdom
7. Department of Radiology, Royal Brompton & Harefield National Health Services Foundation Trust Hospital, London, United Kingdom; and
8. Northwestern Scleroderma Program, Feinberg School of Medicine, Chicago, Illinois