Effects of a combination of sitagliptin plus metformin vs. metformin monotherapy on glycemic control, β-cell function and insulin resistance in type 2 diabetes patients - Giuseppe, D; Anna, C; Ivano, F; Fabrizio, Q; Elena, F; Lucio, B; Aldo, B; Davide, R; Arrigo, C; Pamela, M (Diabetes Res Clin Pract, 2012)