1. Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, Missouri, USA.
2. Shriners Hospitals for Children, St. Louis, St. Louis, Missouri, USA.
3. Department of Biomedical Engineering, Duke University, Durham, North Carolina, USA.
4. Department of Biomedical Engineering, Washington University, St. Louis, Missouri, USA.
5. Center of Regenerative Medicine, Washington University, St. Louis, Missouri, USA.