1. Department of Medicine, Division of Medical Oncology, Duke University Medical Center, Box 3436, Durham, NC 27710
2. Department of Palliative and Supportive Services, Flinders University, Bedford Park, South Australia, 5042, Australia
3. Southern Adelaide Palliative Services, Repatriation General Hospital, 700 Goodwood Road, Daw Park, South Australia, 5041, Australia