1. 1Research Unit of Diabetes and Endocrine Diseases, Fondazione IRCCS “Casa Sollievo della Sofferenza,” San Giovanni Rotondo, Italy
2. 2Department of Experimental Medicine, “Sapienza” University, Rome, Italy
3. 3Biostatistics Unit, Fondazione IRCCS “Casa Sollievo della Sofferenza,” San Giovanni Rotondo, Italy