1. Department of Radiation Oncology, Winship Cancer Institute Emory University School of Medicine Atlanta Georgia USA
2. Department of Health Systems, Management, and Policy Colorado School of Public Health Aurora Colorado USA
3. Division of Medical Oncology, Department of Medicine University of Colorado Denver Aurora Colorado USA
4. Division of Nuclear Medicine, Department of Radiology University of Colorado Denver Aurora Colorado USA
5. Department of Radiation Oncology University of Colorado Denver Aurora Colorado USA
6. Department of Radiation Oncology City of Hope Cancer Center Duarte California USA