Received Feb. 19, 2003; revision received July 9, 2003; accepted July 24, 2003. From the Magnetic Brain Stimulation Laboratory, the Departments of Biological Psychiatry and Neuroscience, New York State Psychiatric Institute; and the Departments of Psychiatry, Pathology, Radiology, and Anatomy and Cell Biology, College of Physicians and Surgeons of Columbia University, New York. Address reprint requests to Dr. Dwork, Department of Neuroscience, New York State Psychiatric Institute, 1051 Riverside Dr., Unit 62, New York, NY 10032; email@example.com (e-mail). Supported in part by NIMH grants MH-60884 and MH-01577 (to Dr. Lisanby), grant MH-35636 (to Dr. Sackeim), a Distinguished Investigator Award (to Dr. Sackeim), and Young Investigator Awards (to Drs. Ilievski and Rosoklija) from the National Alliance for Research on Schizophrenia and Depression. The authors thank Lili Bernstein, B.A., Alma Campos, B.A., Edward Kwon, B.A., Bruce Luber, Ph.D., and Vilas Patel for their assistance with this project.