Litvynova, A. et al. 2022. Diagnostic value of matrix metalloproteinase-9 in the course of osteoarthritis in young persons with excessive body weight and obesity. Journal of Education, Health and Sport. 12, 6 (Jun. 2022), 393–402. DOI:https://doi.org/10.12775/JEHS.2022.12.06.039.