1. Department of Radiation Oncology University of North Carolina School of Medicine Chapel Hill NC USA
2. Department of Radiation Oncology University of Colorado School of Medicine Aurora CO USA
3. Department of Radiation Oncology Washington University School of Medicine St. Louis MO USA
4. Department of Radiation Oncology Duke University Medical Center Durham NC USA
5. Human Oncology University of Wisconsin Madison WI USA
6. Department of Medical Physics Memorial Sloan‐Kettering Cancer Center New York NY USA
7. Department of Imaging Physics University of Texas M D Anderson Cancer Center Houston TX USA
8. Department of Radiology and Nuclear Medicine VU University Medical Center Amsterdam The Netherlands
9. Department of Radiation Oncology University of Washington Seattle WA USA
10. Department of Radiation Oncology Stanford University School of Medicine Stanford CA USA
11. Molecular Imaging and Therapy Service Memorial Sloan‐Kettering Cancer Center New York NY USA
12. Department of Radiology Duke University School of Medicine Durham NC USA
13. Department of Radiology University of Washington Seattle WA USA