1. Mayo Clinic, Jacksonville, FL 32224, USA
2. School of Medicine, University of Colorado Denver, Aurora, CO 80045, USA
3. Hospital Universitario Virgen del Rocío, 41013 Sevilla, Spain
4. Fundación Jiménez Díaz University Hospital, 28040 Madrid, Spain
5. Hospital General de Villalba, 28400 Madrid, Spain
6. Center for Sarcoma and Bone Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
7. Harvard Medical School, Boston, MA 02115, USA
8. Jonsson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, CA 90024, USA
9. Eli Lilly and Company, Indianapolis, IN 46255, USA
10. Institute of Cancer Research, Royal Marsden Hospital, Fulham Road, London SW3 6JJ, UK
11. Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
12. Weill Cornell Medical College, New York, NY 10065, USA