Haring, H.U., Merker, L., Seewaldt-Becker, E., Weimer, M., Meinicke, T., Broedl, U.C., et al. (2014) Empagliflozin as Add-On to Metformin in Patients with Type 2 Diabetes: A 24-Week, Randomized, Double-Blind, Placebo-Controlled Trial. Diabetes Care, 37, 1650-1659.