1. Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
2. Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, MO, USA
3. Division of Rheumatology, Department of Medicine, Washington University in St. Louis, St. Louis, MO, USA
4. Department of Materials Science and Mechanical Engineering, Washington University in St. Louis, St. Louis, MO, USA