Efficacy and safety of canagliflozin compared with placebo and sitagliptin in patients with type 2 diabetes on background metformin monotherapy: A randomisedtrial - Lavalle-González, F J; Januszewicz, A; Davidson, J; Tong, C; Qiu, R; Canovatchel, W; Meininger, G (Diabetologia, 2013)