Direct assessment of articular cartilage and underlying subchondral bone reveals a progressive gene expression change in human osteoarthritic knees

C. H. Chou, C. H. Lee, L. S. Lu, I. W. Song, H. P. Chuang, S. Y. Kuo, J. Y. Wu, Y. T. Chen, V. B. Kraus, C. C. Wu, M. T.M. Lee