Avtar Roopra, Ph.D., is currently a postdoctoral investigaor of Neurology at the University of Wisconsin. Yunfei Huang, Ph.D., is a postdoctoral investigaor of Neuroscience at Johns Hopkins University School of Medicine. Raymond J. Dingledine, Ph.D., is Professor and Chairman of the Department of Pharmacology at Emory University School of Medicine. Address correspondence
to RJD. E-mail rdingledine{at}pharm.emory.edu fax 404-727-0365.