1. The Shoulder and Elbow Service, University of North Carolina, Chapel Hill, North Carolina
2. Department of Orthopaedics, University of North Carolina, Chapel Hill, North Carolina
3. Flexcell International Corporation, Hillsborough, North Carolina
4. Department of Biomedical Engineering, University of North Carolina, Chapel Hill, North Carolina
5. School of Medicine, University of North Carolina, Chapel Hill, North Carolina
6. Department of Orthopaedics, Duke University, Durham, North Carolina