3 Department of Rehabilitation Medicine, Clinical Center, National Institutes of Health, Bethesda, MD, USA.
4 Physical and Rehabilitation Medicine Unit, Scientific Institute of Tradate, Istituti Clinici Scientifici Maugeri IRCCS, Tradate, Varese, Italy.
5 Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy.
6 Department of Physical Medicine, Rehabilitation, and Sports Medicine, University of Puerto Rico School of Medicine, San Juan, Puerto Rico.
7 Department of Physiology, University of Puerto Rico School of Medicine, San Juan, Puerto Rico.
8 Department of Physical Medicine and Rehabilitation, Feinberg School of Medicine, Northwestern University, and Shirley Ryan AbilityLab, Chicago, IL, USA.