1. From the Max-Delbrück-Center for Molecular Medicine (MDC), Berlin-Buch, Germany (T.V., M.B., D.G.); Institute for Clinical Pharmacology, University Clinic Benjamin Franklin, Free University Berlin, Berlin, Germany (D.G.); and Transgenics in Berlin-Buch GmbH, Berlin, Germany (M.B.). T. Voigtländer is now at the Institute of Neurology, University of Vienna, Austria.