Affiliation: | 1. Department of Orthopedic Surgery, Washington University, St. Louis, MO 63110, USA;2. Shriners Hospitals for Children — St. Louis, St. Louis, MO 63110, USA;3. Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA;4. Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA;5. Cytex Therapeutics, Inc., Durham, NC 27705, USA |