Matrix Metalloproteinase 13-Deficient Mice Are Resistant to Osteoarthritic Cartilage Erosion but Not Chondrocyte Hypertrophy or Osteophyte Development. - Little, C. B.; Barai, A.; Burkhardt, D.; Smith, S. M.; Fosang, A. J.; Werb, Z.; Shah, M.; Thompson, E. W. (Arthritis & Rheumatism, 2009)