1. Health Research Unit, School of Health Professions and Rehabilitation Sciences, Southampton, UK
2. Rehabilitation Research Unit, University of Southampton, Southampton, UK
3. Department of Neurology, Tartu, Estonia
4. AHEPA Hospital, Thessaloniki, Greece
5. Italian Multiple Sclerosis Society, Genova, Italy
6. Centre Medical Germaine Revel, Mornant, France
7. National Centre for Multiple Sclerosis, Melsbroek, Belgium
8. The National Hospital for Neurology and Neurosurgery, London, UK