1. Department of Palliative Care, Rehabilitation and Integrative Medicine University of Texas MD Anderson Cancer Center Houston Texas USA
2. The Center of Gerontology and Geriatrics, National Clinical Research Center of Geriatrics Sichuan University West China Hospital Chengdu China
3. Research Medical Library The University of Texas MD Anderson Cancer Center Houston Texas USA
4. Department of Medicine University of Melbourne Fitzroy Australia
5. Palliative Care Service St Vincent's Hospital Fitzroy Australia
6. Palliative Care Service Royal Melbourne Hospital Parkville Australia