1. From the Berenson-Allen Center for Noninvasive Brain Stimulation (E.B.P., A.P.-L.), Harvard Medical School and Beth Israel Deaconess Medical Center, Boston, Mass; the Program in Physical Therapy (J.R.C.), University of Minnesota, Minneapolis, Minn; the Landon Center on Aging and Department of Molecular and Integrative Physiology (R.J.N.), University of Kansas Medical Center, Kansas City, Kan; and Instituto Guttmann de Neurorrehabilitación (A.P.-L.), Universidad Autónoma de Barcelona, Badalona,...