1. Department of Neurology Functional Brain Diagnostics and Therapy High Field MR Center Medical University of Vienna Spitalgasse 23 Vienna 1090 Austria
2. Human Motor Control Section National Institute of Neurological Disorders and Stroke National Institutes of Health 10 Center Drive Bethesda MD 20892–1428 USA
3. Division of Neurosurgery Department of Surgery University of Toronto Toronto ON M5T 2S8 Canada