A treatment strategy implementing combination therapy with sitagliptin and metformin results in superior glycaemic control versus metformin monotherapy due to a low rate of addition of antihyperglycaemic agents. - Olansky L; Reasner C; Seck TL; Williams-Herman DE; Chen M; Terranella L; Mehta A; Kaufman KD; Goldstein BJ (Diabetes, obesity & metabolism, 2011)