1. Non-invasive Brain Stimulation and Human Motor Control Laboratory, Burke Medical Research Institute, White Plains, NY, USA
2. Neurology and Neuroscience Department, Cornell University, NY, USA
3. EMG and Motor Control Unit, Neurology Department, Hospital Clinic, Universitat de Barcelona, Barcelona, Spain
4. Biostatistics and Epidemiology Department, Cornell University, NY, USA
5. The Burke Rehabilitation Hospital, White Plains, NY, USA
6. Centre for Neuromuscular and Neurological Disorders, University of Western Australia, Nedlands, Western Australia, Australia
7. Berenson-Allen Center for Noninvasive Brain Stimulation, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
8. Guttmann University Institute for Neurorehabilitation, Universitat Autonoma de Barcelona, Barcelona, Spain
9. Newman Laboratory for Biomechanics and Human Rehabilitation, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA