PREVALENCE OF VITAMIN D DEFICIENCY AND CORRELATIONS BETWEEN PLASMA 25-HYDROXYVITAMIN D CONCENTRATIONS AND SELECTED BIOCHEMICAL PARAMETERS OF BONE METABOLISM AMONG FEMALE HEALTHCARE WORKERS AGED 45–55 YEARS. YHCĐ 2026, 67 (CD14). https://doi.org/10.52163/yhc.v67iCD14.6459.