1. From the Trans-Tasman Radiation Oncology Group: Department of Radiation OncologyNewcastle Mater Hospital, Newcastle, and Department of Radiation Oncology, Westmead Hospital, Westmead, New South Wales; Royal Adelaide Hospital Cancer Centre, Adelaide, South Australia; Queensland Radium Institute, Royal Brisbane Hospital and Mater Hospital, Brisbane, Queensland; Peter MacCallum Cancer Institute, Melbourne, Victoria, Australia; and Department of Radiation Oncology, Waikato Hospital, Hamilton, New Zealand.