Caro JJ, Klittich WS, Raggio G, Kavanagh PL, O'Brien JA, Shomphe LA, Flegel KM, Copley-Merriman C, Sigler C. Economic assessment of troglitazone as an adjunct to sulfonylurea therapy in the treatment of type 2 diabetes. Clin Ther. 2000 Jan;22(1):116-27.