1. Department of Neurology and Weill Institute for Neurosciences University of California San Francisco California USA
2. Department of Neurology Inselspital University Hospital Bern University of Bern Bern Switzerland
3. Department of Speech, Language, and Hearing Sciences and Department of Neurology The University of Texas at Austin Austin Texas USA
4. Department of Neurological Surgery and Weill Institute for Neurosciences University of California San Francisco California USA