1. Department of Neurobiology and Anatomy, Drexel University College of Medicine, Philadelphia, PA,
2. Department of Neurobiology and Anatomy, Drexel University College of Medicine, Philadelphia, PA
3. Department of Neurology, Yale University, New Haven, CT
4. Department of Physical Medicine and Rehabilitation, Rudolf Magnus Institute of Neuroscience, University Medical Center, Utrecht, the Netherlands
5. Department of Neuro-degeneration, Biogen-IDEC, Inc, Cambridge, MA; Lundbeck Research, Paramus, NJ