1. Department of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
2. Berenson-Allen Center for Noninvasive Brain Stimulation, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical Center, Boston, MA, USA
3. Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
4. Athinoula A. Martinos Centre for Biomedical Imaging, Massachusett General Hospital, Harvard Medical School, Charlestown, MA, USA
5. Department of Neurology, University of Turku, Turku, Finland
6. Division of Clinical Neurosciences, Turku University Hospital, Turku, Finland