1. Wallace H. Coulter Department of Biomedical Engineering, Emory University and Georgia Tech, Atlanta, Georgia, United States
2. Department of Biomedical Sciences, University of Padova, Padua, Italy
3. Department of Kinesiology and Health Education, University of Texas at Austin, Austin, Texas, United States
4. Division of Physical Therapy, Department of Rehabilitation Medicine, Emory University, Atlanta, Georgia, United States