Prevalence of primary headache disorders in a population aged 60 years and older in a rural area of Northern China

Zhang Y, Shi Z, Hock D, Yue W, Liu S, Zhang Y, Liu S, Zhao L, Lu H, Guan Y, Wang X, Wsiniewski T, Ji Y. Prevalence of primary headache disorders in a population aged 60 years and older in a rural area of Northern China. J Headache Pain. 2016; 17(1): 83.