1. Department of Orthopaedics, Box 665, University of Rochester Medical Center, Rochester, New York 14642.
2. From the Orthopaedic Oncology Unit, Massachusetts General Hospital, Boston, Massachusetts.
3. Current affiliation: Department of Orthopaedics, University of Washington School of Medicine, Seattle, Washington.
4. Current affiliation: Department of Orthopaedics, Walter Reed Medical Center, Washington, DC.
5. Current affiliation: Department of Orthopaedics, Duke University Medical Center, Durham, North Carolina 27710.