1. Rheumatology Unit, Department of Medical and Surgical Sciences for Children and Adults, University of Modena and Reggio Emilia, Via del Pozzo No. 71, 41124 Modena, Italy
2. Rheumatology Unit, Federico II University Hospital of Napoli, Via S. Pansini No. 5, 80131 Napoli, Italy
3. Emergency Medicine Unit, Department of Medicine, Emergency Medicine and Medical Specialities, University of Modena and Reggio Emilia, Via del Pozzo No. 71, 41124 Modena, Italy
4. Department of Diagnostic, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Via del Pozzo No. 71, 41124 Modena, Italy