1. Department of Clinical Pharmacology, College of Medicine and Public Health, Flinders Medical Centre, Flinders University, Adelaide, SA, Australia
2. Department of Biomedical Sciences, University of Sassari, Sassari, Italy
3. Quality Control Unit, University Hospital of Sassari (AOUSS), Sassari, Italy
4. Rheumatology Unit, University Clinic and AOU of Cagliari, Cagliari, Italy
5. Rheumatology Unit, Department of Clinical and Experimental Medicine, University Hospital of Sassari (AOUSS), Sassari, Italy