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HA group: patients who received at least one IA HA injection during their follow-up period, N-HA group: patients who received only CS as IA injections, TKR: total knee replacement, IA: intra-articular, HA: hyaluronic acid, CS: corticosteroids, SD: standard deviation. Visits to doctors include visits to rheumatologists, orthopedic surgeons, physicians specialized in physical medicine and rehabilitation or GPs.
