1. Department of Medicine (DAME) University of Udine Udine Italy
2. Institute of Dermatology Azienda Sanitaria Universitaria Friuli Centrale (ASUFC) Udine Italy
3. Rheumatology Clinic Azienda Sanitaria Universitaria Friuli Centrale (ASUFC) Udine Italy
4. Division of Medical Statistics University of Udine Udine Italy
5. Institute of Clinical Pathology Azienda Sanitaria Universitaria Friuli Centrale (ASUFC) Udine Italy