National Cancer Research Institute.Supportive and palliative care research in the UK: report of the NCRI strategic planning group on supportive and palliative care. London: NCRI, 2004.
2.
Davies E., and Higginson IJThe solid facts: palliative care. Copenhagen: World Health Organisation, 2004.
3.
MedicalResearch Council. A framework for development and evaluation of RCTs for complex interventions to improve health. UK: Medical Research Council , 2000.
4.
Rahman A.Why do collaborative research?BMJ2007; 335: 304.