1. The Guttmann University Institute for Neurorehabilitation, Universitat Autónoma de Barcelona, Badalona, Spain
2. Departament de Psicobiologia i Ciéncies de la Salut, Institut de Neurociéncies, Universitat Autónoma de Barcelona, Bellaterra, Spain
3. Berenson-Allen Center for Noninvasive Brain Stimulation, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
4. Department of Physical Therapy, University of Miami, Miller School of Medicine, Miami, USA