Breast cancer stage at diagnosis and area-based socioeconomic status: a multicenter 10-year retrospective clinical epidemiological study in China.
Wang Q, Li J, Zheng S, Li JY, Pang Y, Huang R, Zhang BN, Zhang B, Yang HJ, Xie XM, et al. BMC Cancer. 2012 Mar 29; 12:122. Epub 2012 Mar 29.