1. The Population Council, Center for Biomedical Research (L.-J.Z., C.W.B.), New York, New York 10021
2. Basic Neuroscience Program, National Institute of Neurological Disorders and Stroke (K.K., E.M.), National Institutes of Health, Bethesda, Maryland 20892
3. Laboratory of Cellular and Molecular Regulation, National Institute of Mental Health (A.M.C.), National Institutes of Health, Bethesda, Maryland 20892