Published on in Vol 4, No 1 (2019): Jan-Dec
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/11670, first published
.

1 The 77 Lab, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States
2 Institut de Biomécanique Humaine, Georges Charpak Arts et Métiers, ParisTech, Paris, France
3 Division of Rehabilitation Medicine, Department of Neurology, School of Medicine, University of Maryland, Baltimore, MD, United States