A Randomized, double-blind, comparative therapy evaluating sitagliptin versus glibenclamide in type 2 diabetes patients already treated with pioglitazone and metformin: A 3-Year Study - Giuseppe, D; Arrigo, C; Ivano, F; Fabrizio, Q; Anna, C; Mario, P; Angela, D; Elena, F; Pamela, M (Diabetes Technol Ther, 2013)