1. Department of Health Science, University of Florence, 50134 Florence, Italy
2. Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
3. Health Literacy Laboratory, Department of Health Science, University of Florence, 50134 Florence, Italy
4. GILS (Gruppo Italiano Lotta alla Sclerodermia), 50134 Milan, Italy
5. FESCA (Federation of European Scleroderma Associations), 7500 Saint Maur, Belgium
6. ANMAR Onlus (Associazione Nazionale Malati Reumatici), 00145 Rome, Italy
7. ASSMAF (Associazione per lo Studio della Sclerosi Sistemica e delle Malattie Fibrosanti), 50143 Florence, Italy
8. Rheumatology Unit, Department of Experimental and Clinical Medicine, Section of Internal Medicine, Azienda Ospedaliero-Universitaria Careggi (AOUC), University of Florence, 50134 Florence, Italy
9. Division of Rheumatology, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA
10. Unit of Immunology, Rheumatology, Allergy and Rare Diseases (UnIRAR), IRCCS San Raffaele Hospital, 20132 Milan, Italy