1. Department of Health . NHS Next Stage Review final report. London: DH, 2008.
2. Nicholson D . Implementing the Next Stage Review visions: the quality and productivity challenge. London: DH, 2009.
3. Department of Health . Equity and excellence: liberating the NHS. London: DH, 2010.
4. Conceptual frameworks for health systems performance: a quest for effectiveness, quality, and improvement
5. Raleigh VS Foot C . Getting the measure of quality: opportunities and challenges. London: King's Fund, 2010.