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Hou J, Tan M, Mimi T, Stidham R, Colozzi J, Adams D, El-Serag HB, Waljee A. Accuracy of Administrative Codes for Identifying Patients with Ulcerative Colitis and Crohn’s Disease in the Veterans Affairs Health Care Systems (VAHCS). Poster session presented at: Digestive Disease Week Annual Meeting; 2013 May 20; Orlando, FL.