1. From the Medical College of Wisconsin, Department of Pharmacology and Toxicology, Milwaukee (H.H.P., E.R.G., A.K.H., M.I., K.N., G.J.G.); Brigham and Women’s Hospital/Harvard Medical School, Center for Neurological Diseases, Cambridge, Mass (R.M.F., S.R.G.); Wesleyan University, Department of Physics, Middletown, Conn (L.O.V.E., R.V.J.); and the University of California, San Diego, Department of Pharmacology, La Jolla (H.H.P., R.A.B., P.A.I.).