1. Institute of Pathology, Ulm University, D-89081 Ulm, Germany
2. Executive Director, Chordoma Foundation, Durham, NC 27702, USA
3. Genetics Branch, National Cancer Institute, Bethesda, MD 20892, USA
4. Department of Medicine, Duke University, Durham, NC 27710, USA
5. Department of Surgery, Duke University, Durham, NC 27710, USA
6. Hematology/Oncology (111G), Durham VA Medical Center, 508 Fulton Street, Durham, NC 27705, USA