1. Department of Cellular Neurology, Hertie‐Institute for Clinical Brain Research, Otfried‐Müller Strasse 27 D‐72076 Tübingen Germany
2. Department of Neuropathology, Institute of Pathology, University of Basel CH‐4003 Basel Switzerland
3. Department of Pathology, University of Tübingen D‐72076 Tübingen Germany
4. School of Biomedical Sciences, University of Ulster Coleraine BT52 1SA UK
5. Department of Biochemistry, Adolf Butenandt Institute D‐80336 Munich Germany
6. Department of Pathology and Laboratory Medicine, Indiana School of Medicine Indianapolis Indiana 46202 USA
7. Department of Pharma Research Biology Discovery, F. Hoffmann‐LaRoche Ltd CH‐4070 Basel Switzerland
8. Nathan Kline Institute, New York University School of Medicine Orangeburg New York 10962 USA