1. Department of Neurological Sciences, Rush University Medical Center, Chicago, Illinois, USA
2. Department of Neurology, Emory University, Atlanta, Georgia, USA
3. Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, New York, USA
4. Department of Neurology, Mayo Clinic Scottsdale, Scottsdale, Arizona, USA
5. Department of Neurology, Columbia University, New York, New York, USA
6. Department of Neurology, University of Colorado Medical Center, Denver, Colorado, USA
7. Department of Neurology, University of South Florida, Tampa, Florida, USA
8. Department of Neurology, Mount Sinai School of Medicine, New York, New York, USA
9. Department of Neurology, University of Rochester, Rochester, New York, USA
10. Global BioMedical Operations, Genzyme Corporation, Cambridge, Massachusetts, USA