The survey comparisons on the epidemiology of cataracts among the old aged 50 and above in the urban and rural areas in Jiangbei district of Chongqing

Tang Bin, Li Zhi, Luo Yi et al. The survey comparisons on the epidemiology of cataracts among the old aged 50 and above in the urban and rural areas in Jiangbei district of Chongqing. Chongqing Med J. 2011; 40(6): 561-64.