1. Department of Orthopaedic Surgery, Orthopaedic Oncology Service, Massachusetts General Hospital-Harvard Medical School, Boston, Massachusetts
2. Department of Orthopedic Surgery, University Medical Center Utrecht, Utrecht, The Netherlands
3. Department of Hematology/Oncology-Center for Multiple Myeloma, Massachusetts General Hospital-Harvard Medical School, Boston, Massachusetts
4. Department of Radiation Oncology, Massachusetts General Hospital-Harvard Medical School, Boston, Massachusetts
5. Department of Orthopedic Surgery, St. Antonius Hospital, Utrecht, The Netherlands
6. Department of Orthopedic Surgery, OLVG, Amsterdam, Amsterdam, The Netherlands