1. Metrology Research Centre National Research Council of Canada Ottawa Ontario Canada
2. Department of Medical Physics University of Wisconsin ‐ Madison MadisonWisconsinUnited States
3. Radiation Oncology Miami Cancer Institute MiamiFloridaUnited States
4. Department of Radiation Medicine and Applied Sciences UC San Diego School of Medicine La JollaCaliforniaUnited States
5. Department of Radiation Oncology University of Maryland School of Medicine ColumbiaMarylandUnited States
6. Department of Radiation Physics UT M.D. Anderson Cancer Center HoustonTexasUnited States
7. Metrology Research Centre National Research Council of Canada OttawaOntarioCanada
8. Department of Radiation Oncology University of Toronto Toronto OntarioCanada
9. Department of Radiation Oncology University of Virginia Health System CharlottesvilleVirginiaUnited States
10. Département de radio‐oncologie CIUSSS de l'Est‐de‐l'Île‐de‐Montréal – Hôpital Maisonneuve‐Rosemont MontrealQuebecCanada
11. Department of Radiation Therapy Michael E. DeBakey VA Medical Center HoustonTexasUnited States