1. Laboratory of Biomechanics and Physiology of Locomotion, Institute of NeuroScience, Université catholique de Louvain, Louvain-la-Neuve, Belgium
2. Laboratory of Neuromotor Physiology, IRCCS Santa Lucia Foundation, Rome, Italy
3. Department of Mechanical Engineering, Vanderbilt University, Nashville, Tennessee
4. Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee
5. Department of Physical Medicine and Rehabilitation, Vanderbilt University, Nashville, Tennessee
6. Department of Systems Medicine and Center of Space Biomedicine, University of Rome Tor Vergata, Rome, Italy