1. Departments of Medical Oncology, Boston, Massachusetts, USA
2. Department of Medical Oncology Institute Gustave Roussy, Villejuif, France
3. Department of Health Care Policy Harvard Medical School, Boston, Massachusetts, USA
4. Division of General Internal Medicine, Brigham and Women’s Hospital, Boston, Massachusetts, USA
5. Biostatistics and Computational Biology Dana-Farber Cancer Institute, Boston, Massachusetts, USA