1. The Wallace H. Coulter Department of Biomedical Engineering at Emory University and Georgia Tech Atlanta Georgia USA
2. Department of Medicine, Division of General Medicine and GeriatricsEmory University School of Medicine Atlanta Georgia USA
3. Rehabilitation R&D CenterAtlanta Veterans Affairs Medical Center Atlanta Georgia USA
4. Department of NeurologyEmory University School of Medicine Atlanta Georgia USA
5. Department of Rehabilitation Medicine, Division of Physical TherapyEmory University School of Medicine Atlanta Georgia USA