1. Endocrinology and Diabetes, Department of Medical Sciences, University of Cagliari, Policlinico Universitario, 09042 Cagliari, Italy
2. Department of Clinical Sciences, University of Rome “Sapienza”, 00161 Rome, Italy
3. Department of Molecular and Clinical Medicine, Sahlgrenska Center for Cardiovascular and Metabolic Research, University of Gothenburg, 431 45 Gothenburg, Sweden
4. Department of Medical and Surgical Sciences, University of Magna Graecia, 88100 Catanzaro, Italy
5. Department of Clinical and Medical Therapy, University of Rome “Sapienza”, 00185 Rome, Italy