Ertugliflozin plus sitagliptin versus either individual agent over 52 weeks in patients with type 2 diabetes mellitus inadequately controlled with metformin: The VERTIS FACTORIAL Randomized Trial - Pratley, R E; Eldor, R; Raji, A; Golm, G; Huyck, S B; Qiu, Y; Sunga, S; Johnson, J; Terra, S G; Mancuso, J P; Engel, S S; Lauring, B (Diabetes Obes Metab, 2018)