Efficacy and Safety of Vildagliptin Monotherapy during 2-Year Treatment of Drug-naïve Patients with Type 2 Diabetes: Comparison with Metformin - Göke, B.; Hershon, K.; Kerr, D.; Calle Pascual, A.; Schweizer, A.; Foley, J.; Shao, Q.; Dejager, S. (Hormone and Metabolic Research, 2008)