1. Department of Psychiatry, Cincinnati Veterans Affairs Medical Center, Cincinnati, OH 45220, and University of Cincinnati College of Medicine, Cincinnati, OH 45267
2. Cleveland Veterans Affairs Medical Center (Wade Park), Cleveland, OH 41106
3. Department of Neurosurgery, Case Western Reserve University, Cleveland, OH 44106
4. Department of Medicine, Cincinnati Veterans Affairs Medical Center, Cincinnati, OH 45220, and University of Cincinnati College of Medicine, Cincinnati, OH 45267