1. Department of Pathology and Laboratory Medicine, University of Medicine and Dentistry of New Jersey (UMDNJ), Robert Wood Johnson Medical School, Piscataway, NJ 08854
2. Department of Neurology and Neurosurgery, McGill University
3. Center for Neuroscience Research, Montréal General Hospital Research Institute, Montréal, Québec H3G 1A4, Canada
4. Max-Planck Institute for Biochemistry, D-8285 Martinsried, Germany
5. Institute for Biochemistry II, Medical Faculty, University of Cologne, D-50924 Cologne, Germany
6. Department of Human Anatomy and Cell Biology, University of Liverpool, Liverpool L69 3G3E, UK