1. Rheumatology Unit Azienda Unità Sanitaria Locale‐IRCCS di Reggio Emilia Reggio Emilia Italy
2. Università di Modena e Reggio Emilia Modena Italy
3. Molecular Biology Laboratory Azienda Unità Sanitaria Locale‐IRCCS di Reggio Emilia Reggio Emilia Italy
4. Clinical Chemistry and Endocrinology Laboratory Azienda Unità Sanitaria Locale‐IRCCS di Reggio Emilia Reggio Emilia Italy
5. National Human Genome Research Institute National Institutes of Health Bethesda MD USA
6. National Institute of Arthritis and Musculoskeletal and Skin Diseases National Institutes of Health Bethesda MD USA