1. Department of Rheumatology, Royal Hallamshire Hospital, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, United Kingdom
2. Department of Rheumatology, Cochin Hospital, AP-HP, Paris Descartes University, Paris, France
3. Department of Experimental and Clinical Medicine, University of Florence, Division of Rheumatology AOUC, Florence, Italy
4. Centre of Rheumatology, Royal Free Hospital, University College London, London, United Kingdom
5. Scleroderma Program, University of Michigan, Ann Arbor
6. Translational Matrix Biology and Department for Dermatology, Medical Faculty, Cologne, Germany