1. Department of Neurology, Donders Institute for Brain, Cognition, and Behavior; Radboud University Medical Center; Nijmegen the Netherlands
2. Maasziekenhuis Pantein; Boxmeer the Netherlands
3. Research Center for Brain Function and Medical Engineering; Asahikawa Medical University; Asahikawa Japan
4. Joseph Fourier University, Grenoble Universities; Grenoble France
5. Division of Neurosurgery; University of Toronto; Toronto Ontario Canada
6. Department of Neurosurgery; Ohio State University; Columbus OH
7. Morton and Gloria Shulman Movement Disorders Centre and the Edmond J. Safra Program in Parkinson's Disease, Toronto Western Hospital; University Health Network; Toronto Ontario Canada
8. John Radcliffe Hospital; Headington Oxford United Kingdom
9. Department of Neurology, Jean and Paul Amos Parkinson's Disease and Movement Disorders Center; Emory University School of Medicine; Atlanta GA
10. Human Motor Control Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health; Bethesda MD