Received Nov. 12, 2003; revision received June 14, 2004; accepted June 30, 2004. From Harvard Medical School’s VA Boston Healthcare System–Brockton Division (Department of Psychiatry, Laboratory of Neuroscience, Clinical Neuroscience Division) and Brigham and Women’s Hospital (Department of Radiology, Surgical Planning Laboratory, MRI Division), Boston. Address correspondence and reprint requests to Dr. McCarley or Dr. Shenton, Department of Psychiatry (116A), Boston VA Healthcare System–Brockton Division, Harvard Medical School, 940 Belmont St., Brockton, MA 02301; email@example.com; firstname.lastname@example.org (e-mail). Supported in part by Department of Veterans Affairs Merit Awards to Drs. Niznikiewicz, Shenton, Nestor, and McCarley; a Middleton Award from the Department of Veterans Affairs to Dr. McCarley; NIMH grants to Dr. Shenton (K02 MH-01110 and R01 MH-50747) and Dr. McCarley (R01 MH-40799); and a grant from the Welfide Medicinal Research Foundation, Japan (Dr. Onitsuka). The authors thank Marie M. Fairbanks for administrative support and Sarah K. Toner, B.A., Lisa C. Lucia, B.S., Meredith C. Klump, B.A., and Sarah M. Rabbitt, B.A., for research assistance.