1. Centre for Cancer Research and Cell Biology, Queen’s University Belfast, Belfast, Ireland
2. Radiotherapy Physics, Northern Ireland Cancer Centre, Belfast City Hospital, Belfast, Ireland
3. Department of Clinical Oncology, Northern Ireland Cancer Centre, Belfast City Hospital, Belfast, Ireland
4. Department of Clinical Oncology, North West Cancer Centre, Altnagelvin Area Hospital, Londonderry, Northern Ireland
5. Department of Medical Physics, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada