... MA, USA, 2National Institutes of Health; Bethesda, MD, USA, 3Boston University; Boston, MA, USA, 4University of Washington; Seattle, WA, USA, 5University of Pittsburgh; Pittsburgh, PA, USA, ... FL, USA, 7Powers Pyles Sutter & Verville PC; Washington, DC, USA, 8University of Texas Medical Branch/Galveston; Galveston, TX, USA, 9Case Western Reserve University; Cleveland, OH, USA, ... 10Rehabilitation Institute of Chicago; Chicago, IL, USA and 11University of Michigan; Ann Arbor, MI, USAEmail: Walter R Frontera* - wfrontera@partners.org; Marcus J Fuhrer - fuhrerm@mail.nih.gov; Alan...