1. Department of Medicine and SurgeryFederico II UniversityNaplesItaly
2. Rheumatic Diseases UnitMolecular Medicine Centre, Western General Hospital, University of EdinburghEdinburghUK
3. Department of MedicineSurgery and Neurosciences, University of SienaSienaItaly
4. Institute of Genetics and Biophysics “Adriano Buzzati‐Traverso,”Italian National Research CouncilNaplesItaly