1. Neurological Clinical Research Institute, Massachusetts General Hospital, Boston, MA, USA
2. UCB Pharma, Brussels, Belgium
3. UCB Pharma, Slough, UK
4. Costello Medical, Cambridge, UK
5. Costello Medical, London, UK
6. UCB Pharma, København, Denmark
7. UCB Pharma, Morrisville, NC, USA
8. UCB Pharma, Switzerland and
9. Department of Neurology, Temple University, Philadelphia, PA, USA