1. Units of Diabetology, ASUR Marche, 63900 Fermo, Italy
2. Humanitas Research Hospital, 20089 Rozzano, Italy
3. School of Nursing, Polytechnic University of Marche, 60121 Ancona, Italy
4. Azienda Ospedaliera San Giovanni Addolorata, 00184 Rome, Italy
5. School of Medicinal and Health Products Sciences, University of Camerino, 62032 Camerino, Italy