1. Department of Internal Medicine and Medical Specialties (S.Z., M.C., M.S., G.C., G.L., L.C., C.T., R.B.), “Sapienza” University, 00161 Rome, Italy
2. General Medicine, Diabetes, and Endocrinology (E.B.), San Raffaele Vita-Salute University, 20132 Milan, Italy
3. Department of Internal Medicine (A.F.), University of Perugia, 06123 Perugia, Italy