1. Department of Orthopaedic Surgery and Duke Clinical Research Institute, Duke University, Durham, North Carolina, USA
2. Biostatistics & Bioinformatics and Duke Clinical Research Institute, Duke University, Durham, North Carolina, USA
3. Department of Orthopaedic Surgery, Division of Trauma, Duke University, Durham, North California, USA
4. Department of Orthopaedic Surgery, Division of Sports Medicine, Duke University, Durham, North California, USA
5. Department of Orthopaedic Surgery, Division of Adult Reconstruction, Duke University, Durham, North California, USA
6. Department of Orthopaedic Surgery, Division of Physical Therapy, Duke University, Durham, North California, USA