1. Departments of Pharmacology and Toxicology (I.A., P.G.K., K.M.G., W.B.C.), Medical College of Wisconsin, Milwaukee, Wisconsin 53226
2. Department of Medicine III (I.A., S.R.B.), Carl Gustav Carus Medical School, University of Technology, D-01307 Dresden, Germany
3. Department of Pharmacology (P.G.K.), Chicago College of Osteopathic Medicine, Midwestern University, Downers Grove, Illinois 60515
4. Departments of Physiology (A.W.C.), Medical College of Wisconsin, Milwaukee, Wisconsin 53226