Robust improvements in fasting and prandial measures of beta-cell function with vildagliptin in drug-naive patients: Analysis of pooled vildagliptin monotherapy database - Pratley, R E; Schweizer, A; Rosenstock, J; Foley, J E; Banerji, M A; Pi-Sunyer, F X; Mills, D; Dejager, S (Diabetes Obes Metab, 2008)