1. Radiation Oncology British Columbia Cancer and University of British Columbia Vancouver Canada
2. Radiation Oncology Department of Radiotherapy Medical University Vienna Vienna Austria
3. Department of Radiotherapy Faculty of Medicine Martin Luther University Halle‐Wittenberg Halle (Saale) Germany
4. Velindre Cancer Centre Cardiff Wales UK
5. Department of Radiotherapy University Medical Center Giessen‐Marburg Marburg Germany
6. Department of Pediatrics Roswell Park Comprehensive Cancer Center, and University of Buffalo Jacobs School of Medicine and Biomedical Sciences Buffalo New York
7. Pediatric Hematology and Oncology Department of Pediatrics Medical College of Wisconsin Wisconsin Milwaukee
8. Radiation Oncology and Pediatrics University of Rochester Medical Center Rochester New York
9. Radiation Oncology Yale University New Haven Connecticut
10. Radiation Oncology Princess Margaret Cancer Center and University of Toronto Toronto Canada