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1Departments of Medicine and Dermatology, Division of Immunology and Rheumatology, Stanford University and Palo Alto VA Health Care System, CA, USA; 2Centre for Rheumatology, Royal Free Hospital, London, United Kingdom; 3Department of Rheumatology, University Hospital Zurich, Switzerland; 4Department of Medicine, Division of Rheumatology, University of California at Los Angeles, Los Angeles, USA; 5University of Michigan Scleroderma Program, Ann Arbor, USA; 6Department of Medicine, Division of Rheumatology, University of Pennsylvania, Philadelphia, USA. Lorinda Chung, MD, MS Christopher P. Denton, PhD, FRCP Oliver Distler, MD Daniel E. Furst, MD Dinesh Khanna, MD, MS Peter A. Merkel, MD, MPH Please address correspondence and reprint requests to: Peter Merkel, MD, MPH, University of Pennsylvania, 8th Floor Penn Tower, 3400 Spruce Street, Philadelphia, PA 19104, USA. E-mail: [email protected] Received on March 29, 2012; accepted in revised form on May 15, 2012. Clin Exp Rheumatol 2012; 30 (Suppl. 71): S97-S102. © Copyright CLINICAL AND EXPERIMENTAL RHEUMATOLOGY 2012.