1 Rheumatology Unit, Department of Medical Sciences, University of Ferrara, Italy. [email protected].
2 Scleroderma Clinic, UOC Clinica Reumatologica, ASST Gaetano Pini-CTO Milan, and Department of Clinical Sciences and Community Health, Research Centre for Adult and Paediatric Rheumatic Diseases, University of Milan, Italy.
3 Pathology Unit, Department of Medical Sciences, University of Turin, Italy.