1. Department of Orthopaedics, Emory University School of Medicine, Atlanta, Georgia, USA.
2. Department of Veterans Affairs, Atlanta VA Medical Center, Decatur, Georgia, USA.
3. Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, Washington, USA.
4. Department of Mechanical Engineering, University of Washington, Seattle, Washington, USA.
5. Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, USA.
6. Department of Orthopaedic Surgery, Cooper Medical School of Rowan University, Camden, New Jersey, USA.