1. Important concepts and definitions;Waller,1996
2. The management of terminal disease,1978
3. World Health Organization. Definition of palliative care. 2006. Available from www.who.int/cancer/palliative/definition.
4. The epidemiology of death and symptoms;Higginson,2005
5. Meta-analysis in clinical trials;DerSimonian;Control Clin Trials,1986