1. Department of Orthopaedics, Alpert Medical School of Brown University and Rhode Island Hospital, Providence, Rhode Island.
2. Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, and Shriners Hospitals for Children, Boston, Massachusetts.
3. Skeletal Biology Laboratory, Department of Orthopedic Surgery, Brigham and Women's Hospital, Boston, Massachusetts.
4. Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia.