Affiliation: | (1) Department of Neuropathology, University of Heidelberg, Im Neuenheimer Feld 220, W-6900 Heidelberg, Federal Republic of Germany;(2) Department of Neurology, University of Heidelberg, Im Neuenheimer Feld 220, W-6900 Heidelberg, Federal Republic of Germany;(3) Department of Physiology, University of Heidelberg, Im Neuenheimer Feld 220, W-6900 Heidelberg, Federal Republic of Germany;(4) Bristol-Myers Squibb Pharmaceutical Research Institute, Princeton, NJ, USA |