Serum levels of collagenase, stromelysin-1, and TIMP‐1. Age- and sex-related differences in normal subjects and relationship to the extent of joint involvement and serum levels of antigenic keratan sulfate in patients with osteoarthritis. - Manicourt,D.H.; Fujimoto,N.; Obata,K.; Thonar,E.J. (Arthritis Rheum, 1994)