1. The aging of populations and its economic and social implications,1956
2. World health statistics,2016
3. Shanghai Bureau of Statistics. Shanghai Statistical Yearbook [EB/OL] [Internet]. Shanghai Statistical Network. Available from: http://www.stats-sh.gov.cn/tjnj/nj17.htm?d1=2017tjnj/C0201.htm
4. Analysis of factors influencing the use of medical services of elderly people;CL Zhang;Popul Res,1996
5. Study on the health status and application of health service of old population in rural area;L Yang;Mod Prev Med,2008