1. Nell Hodgson Woodruff School of Nursing; Emory University; Atlanta Georgia
2. Radiation Therapy Oncology Group-Statistical Center; Philadelphia Pennsylvania
3. Department or Radiation Oncology; Washington University; St. Louis Missouri
4. Image-Guided Therapy Quality Assurance Center; Washington University; St. Louis Missouri
5. Department of Radiation Oncology; Thomas Jefferson University Hospital
6. Department of Pathology and Laboratory Medicine; Cedars-Sinai Medical Center; Los Angeles California
7. Department of Radiation Oncology; University of Montreal Hospital Center-Notre Dame; Montreal Quebec Canada
8. Department of Radiation Oncology; Juravinski Cancer Center; Hamilton Ontario Canada
9. Department of Radiation Oncology; Cross Cancer Institute; Edmonton Alberta Canada
10. London Health Sciences Center; University of Western Ontario; London Ontario Canada
11. Department of Oncology; Tom Baker Cancer Center; Calgary Alberta Canada
12. Department of Oncology; McGill University; Montreal Quebec Canada