Christopher H. Hawkes MD has a longstanding career as a clinical neurologist in the NHS. He is Honorary Professor of Neurology at Barts School of Medicine and Dentistry and formerly honorary consultant at the Institute of Neurology, Queen Square, University College London. He is Executive Editor and founder of the journal Multiple Sclerosis and Related Disorders. Bettina Balint MD is Assistant Professor for Clinical Research on Complex Movement Disorders and Parkinson´s Disease at the University of Zurich, and Head of the Movement Disorder Department at the University Hospital Zurich. José Biller MD is Professor and Chair of Neurology at Loyola University Chicago Stritch School of Medicine. He served as a Director of the American Board of Psychiatry and Neurology (1994-2001) and as President (in 2001), and currently holds the title of Emeritus Director.