ABSTRACT Aim of the work: To assess the serum 25-hydroxyvitamin D concentrations [25(OH)D] and their relationship with parameters of disease activity in upper Egyptian patients with rheumatoid arthritis (RA). Patients and methods: A case-control study was made on 34 patients with RA and 34 healthy control subjects. The following values were assessed for each patient: erythrocyte sedimentation rate (ESR), C ...
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