1. United Nations Department of Economic and Social Affairs: World Population Prospects: 2006 revision. 2006, [http://esa.un.org/unpp/]
2. The International Institute for Applied Systems Analysis: China's Population by Age and Sex, 1950-2050. 2008, [http://www.iiasa.ac.at/collections/IIASA_Research/SRD/ChinaFood/data/anim/pop_ani.htm]
3. Yang GH: The Transition of Health Mode and the Control Strategy on Chronic Diseases in China. Chinese Journal of Prevention and Control of Chronic Non-communicable diseases. 2001, 9: 145-148.
4. Zhang PH, Jiao SF, Zhou Y, Li G, Shi Y, Li H, Ren ZY, Wu F, Jiang Y, Guo XH, et al: Studies on prevalence and control of several common chronic diseases among Beijing adults in 2005. Chinese Journal of Epidemiology. 2007, 28: 625-630.
5. World Health Organization: Towards an International Consensus on Policy for Long-Term Care of the Ageing. Geneva. 2000, 10.1080/09540260802094712.