1. E. A. Murray, Laboratory of Neuropsychology, National Institute of Mental Health, Bethesda, MD 20892.
2. Unit on Molecular and Cellular Neurobiology, Laboratory of Cell Biology, National Institute of Mental Health, Bethesda, MD 20892.
3. Department of Laboratory Medicine and Pathology, University of Medicine and Dentistry-New Jersey Medical School, Newark, NJ 07103.