Lực, T.V., Hương, N.T.T., Thướng, V.D., Tâm, N.N. and Huyền, V.T.T. 2023. 4. Factors related to chronic knee pain in elderly patients with primary knee osteoarthritis. Journal of Medical Research. 165, 4 (Apr. 2023), 25-33. DOI:https://doi.org/10.52852/tcncyh.v165i4.1485.