Predicting Clinically Significant Response to Primary Care Treatment for Depression from Electronic Health Records of Veterans Ming-Un Myron Chang, VA Center for Clinical Management Research, VA Ann Arbor Healthcare System; Mary C. Vance, Center for the Study of Traumatic Stress, Uniformed Services University; Jeremy B. Sussman, Department of Internal Medicine, University of Michigan; Kara Zivin, Department of Psychiatry, University of Michigan; Paul N. Pfeiffer, Department of Psychiatry, University of Michigan