1 From the Veterans Affairs Mid Atlantic Mental Illness Research, Education, and Clinical Center and the Research and Academic Affairs Service Line at the W.G. Hefner Veterans Affairs Medical Center in Salisbury, N.C. (JRB, RAH, KHT); the Department of Neurology at Wake Forest School of Medicine in Winston-Salem, N.C. (JRB); the Departments of Psychiatry and Radiology at Wake Forest School of Medicine in Winston-Salem, N.C., and the Menninger Department of Psychiatry and Behavioral Sciences at Baylor College of Medicine in Houston, Tex. (RAH); and the Division of Biomedical Sciences at the Via College of Osteopathic Medicine in Blacksburg, Va., and the Department of Physical Medicine and Rehabilitation at Baylor College of Medicine in Houston, Tex. (KHT).