Effects on alpha- and beta-cell function of sequentially adding empagliflozin and linagliptin to therapy in people with type 2 diabetes previously receiving metformin: An exploratory mechanistic study - Forst, T; Falk, A; Andersen, G; Fischer, A; Weber, M M; Voswinkel, S; Heise, T; Kapitza, C; Plum-Morschel, L (Diabetes Obes Metab, 2017)