1. Department of Orthopaedic Surgery, University of California, Irvine, Orange, California, USA
2. Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York, USA
3. Department of Orthopaedic Surgery, University of California, San Diego, San Diego, California, USA
4. Department of Biomedical Engineering, University of California, Irvine, Irvine, California, USA