1. Ontario Health–Cancer Care Ontario, Toronto, Canada
2. Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
3. Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Canada
4. Department of Health Sciences, Brock University, St Catharines, Canada
5. ICES, Toronto, Canada
6. Department of Medicine, Sunnybrook Health Sciences Centre, Toronto, Canada
7. Department of Medicine, University of Toronto, Toronto, Canada
8. Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
9. Department of Obstetrics and Gynecology, University of Toronto, Toronto, Canada
10. Department of Medical Oncology, Sunnybrook Health Sciences Centre, Toronto, , Canada
11. Radiation Medicine Program, Princess Margaret Cancer Centre, Toronto, Canada
12. Department of Radiation Oncology, University of Toronto, Toronto, Canada
13. Department of Medical Oncology, R.S. McLaughlin Durham Regional Cancer Centre, Oshawa, Canada
14. Department of Radiology, McMaster University, Hamilton, Canada
15. Niagara Health, St Catharines, Ontario, Canada
16. Department of Otolaryngology–Head and Neck Surgery, University of Toronto, Toronto, Canada
17. Department of Surgical Oncology, Princess Margaret Cancer Centre, Toronto, Canada
18. for the Cancer Care Ontario COVID-19 Impact Working Group