1 Department of Radiation Oncology, University of Michigan, Ann Arbor, Michigan.
2 Departments of Radiation Oncology and Medical Ethics and Health Policy, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania.
3 Department of Radiation Oncology, Harvard Medical School, Boston, Massachusetts.
4 Department of Radiation Oncology, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, North Carolina.
5 Division of Radiation Oncology, Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas.
6 Section of Hospital Medicine, Department of Medicine, The University of Chicago, Chicago, Illinois.
7 Division of Radiation Oncology, Department of Radiation Oncology, Department of Health Services Research, The University of Texas MD Anderson Cancer Center, Houston, Texas.
8 Department of Therapeutic Radiology, Yale School of Medicine, New Haven, Connecticut.