1. Veterans Affairs Medical Center, Salem, and Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, Virginia,
2. Virginia Polytechnic Institute and State University, Blacksburg, Virginia
3. Veterans Affairs Medical Center, Salem, and Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, Virginia
4. Catawba Hospital, Catawba, Virginia
5. University of Virginia School of Medicine, Roanoke Valley Program, Salem, Virginia