Dahlberg, Leif, Leif Ryd, Dick Heinegård, and L. Stefan Lohmander. “Proteoglycan Fragments in Joint Fluid”. Acta Orthopaedica 63, no. 4 (January 1, 1992): 417–423. Accessed May 26, 2026. https://actaorthop.org/actao/article/view/22027.