1. Department of Epidemiology, Erasmus MC, Rotterdam, the Netherlands
2. The Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
3. Department of Radiation Oncology, University of Toronto, Toronto, Ontario, Canada
4. Radiation Medicine Program, Princess Margaret Cancer Centre, Toronto, Ontario, Canada
5. Department of Otolaryngology–Head and Neck Surgery, University of Ottawa, Ottawa, Ontario, Canada
6. Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA
7. Department of Epidemiology and Department of Radiology, Erasmus MC, Rotterdam, the Netherlands
8. Center for Health Decision Sciences, Harvard T. H. Chan School of Public Health, Boston, Massachusetts, USA