1. Division of Population Sciences, Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts, USA.
2. Division of Population Sciences, Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.
3. University of California San Diego Medical School, San Diego, California, USA.
4. Healthwise/Informed Medical Decisions Foundation, Boston, Massachusetts, USA.
5. Health Decisions Sciences Center, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA.
6. Department of Health Care Policy, Harvard Medical School and Division of General Internal Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.