1. Department of Pathology, University of São Paulo School of Medicine, São Paulo, Brazil.
2. Division of Physical Medicine, Institute of Orthopaedics and Traumatology, University of São Paulo School of Medicine, São Paulo, Brazil.
3. Laboratory of Neuromodulation, Spaulding Rehabilitation Hospital, Harvard Medical School, Boston, MA.
4. Berenson-Allen Center for Noninvasive Brain Stimulation, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA.