1. Division of Rheumatology, “La Colletta” Hospital, Local Health Trust 3, Arenzano, Italy
2. Autoimmunology Laboratory, University of Genoa, Genoa, Italy
3. Department of Internal Medicine, Clinical Division of Internal Medicine II, Medical University of Innsbruck/Tirol Kliniken, Innsbruck, Austria
4. Department of Rheumatology and Immunology, Medical University of Graz, Graz, Austria
5. Department of Rheumatology, Hospital of Brunico (SABES-ASDAA), Brunico, Italy