1. Departments of Neurobiology and Anatomical Sciences (C.F., M.N.L.), West Virginia University Health Sciences Center, Morgantown, West Virginia 26506-9229
2. University of Mississippi Medical Center, Jackson, Mississippi 39216-4505; and Department of Physiology and Pharmacology (L.M., R.B.M., S.L.H., P.G., R.L.G.), West Virginia University Health Sciences Center, Morgantown, West Virginia 26506-9229
3. Physiology (L.M.C., N.N.), West Virginia University Health Sciences Center, Morgantown, West Virginia 26506-9229