1. Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
2. Unit of Biostatistics, IRCSS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
3. Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy
4. Unit of Diabetology, Sandro Pertini Hospital, Rome, Italy
5. IRCSS Casa Sollievo della Sofferenza, Department of Medicine, San Giovanni Rotondo, Italy
6. Laboratory of Clinical Chemistry, IRCSS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
7. Unit of Diabetology, S. Spirito Hospital - AslRM1, Rome, Italy
8. Campus Biomedico University, Rome, Italy
9. IRCCS Casa Sollievo della Sofferenza, Research Unit of Metabolic and Cardiovascular Diseases, San Giovanni Rotondo, Italy
10. Department of Clinical and Molecular Medicine, Sapienza University of Rome, Rome, Italy