1 From the Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine, Chicago, Illinois (AWH); ShirleyRyan AbilityLab, Chicago, Illinois (AWH); (Retired) Gaithersburg, Maryland (MF); Department of Physical Medicine, Rehabilitation, and Sports Medicine, University of Puerto Rico School of Medicine, San Juan, Puerto Rico (WRF); Department of Physiology and Biophysics, University of Puerto Rico School of Medicine, San Juan, Puerto Rico (WRF); Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, Illinois (SAG); Department of Veterans Affairs, Jesse Brown VA Medical Center, Chicago, Illinois (SAG); Ball State University, Muncie, Indiana (LAK); Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy (SN); IRCCS Fondazione Don Gnocchi, Milan, Italy (SN); Department of Occupational and Recreational Therapies, University of Utah, Salt Lake City, Utah (LGR); and Rehabilitation Department, Faculty of Medicine, Universite´ Laval, Quebec City, Quebec, Canada (CV).