1. Department of Integrative Biology and Physiology (A.B.), University of Minnesota, Minneapolis, Minnesota 55455;
2. Department of Neuroscience (R.P.), University of Rome Tor Vergata, 00133 Rome, Italy;
3. Department of Medicine (S.K.M.), University of California at San Diego and Veterans Affairs San Diego Healthcare System, La Jolla, California 92093;
4. Department of Pharmacology (R.F.-C.), Innsbruck Medical University, A-6020 Innsbruck, Austria;
5. Section on Cellular Neurobiology (Y.P.L.), Program on Developmental Neuroscience, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892;
6. Fishberg Department of Neuroscience (S.R.J.S.), Brookdale Department of Geriatrics and Palliative Medicine, and Friedman Brain Institute, Mount Sinai School of Medicine, New York, New York 10029