1. Division of Radiation Oncology, Westmead Hospital, Westmead, Australia
2. CCORE (Collaboration for Cancer Outcomes Research and Evaluation), Liverpool Health Service, Australia
3. Department of Palliative Care, Nepean Hospital, Penrith, Australia
4. Department of Radiation Oncology, Royal Prince Alfred Hospital, Camperdown, Australia
5. Department of Radiation Oncology, St Vincent's Hospital, Darlinghurst, Australia