2BALAZS E A,BLOOM G,SEANN G.Fine structure and glycosa mininoglycan content of the surface layer of articular cartilage[J].Fed Proc,1966,25(6):1813.
3WRIGHT E A,KATZ JN,et al.mpact of knee osteoarthritis on halth care resource utilization in a US population-based national sample[J].Med Care,2010,48(9):785-791.
4BROOKS P M.The burden of musculoskeletal disease-a global perspective[J].Clinical rheumatology,2006,25(6):778-781.