1. Shirley Ryan AbilityLab, Center for Bionic Medicine, Chicago, IL, USA
2. Department of Surgery, Walter Reed National Military Medical Center, Uniformed Services University, Bethesda, MD, USA
3. Department of Rehabilitation, Orthotic and Prosthetic Service, Walter Reed National Military Medical Center, Bethesda, MD, USA
4. Division of Plastic Surgery, Northwestern Feinberg School of Medicine, Chicago, IL, USA