1. Department of Health. Developing primary care groups. HSC 1998/139. Crown Copyright, 1998.
2. Department of Health. Putting patients first. NHS Wales, 1998.
3. Department of Health. The new NHS modern dependable. Cm 3807. Crown Copyright, 1997.
4. Toward an operational definition of health;Patrick;Journal of Health and Social Behaviour,1973
5. The sickness impact profile: conceptual formulation and methodology for the development of a health status index;Berger;International Journal of Health Services,1976