1. Politics of Aging: Government agencies and the aging network. http://www.trinity.edu/mkearl/ger-pol.html .
2. Schmitt, R. et al. Recovery of kidney function after acute kidney injury in the elderly: a systematic review and meta-analysis. Am. J. Kidney Dis. 52, 262–271 (2008).
3. Redfern, S. J. & Ross, F. M. Nursing Older People, 3rd edn (eds Redfern, S. J. & Ross, F. M.) xi (Churchill Livingstone, Philadelphia, 1999).
4. Ricci, Z., Cruz, D. & Ronco, C. The RIFLE criteria and mortality in acute kidney injury: a systematic review. Kidney Int. 73, 538–546 (2008).
5. United Nations Department of Economic and Social Affairs Population Division. World Population Ageing: 1950–2050 [online] , (2001).