Low prevalence of knee and back pain in southeast China; the Shantou COPCORD study

Zeng QY, Chen R, Xiao ZY, Huang S-B, Liu Y, Xu JC, Chen SL, Darmawan J, Couchman KG, Wigley RD, Muirden KD. Low prevalence of knee and back pain in southeast China; the Shantou COPCORD study. J Rheumatol. 2004; 31(12): 2439-43.