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Vitamin D concentrations at baseline (T0) and postoperative at 1 day (T1), 4 days (T2), and 6 weeks (T4) after THA in 87 osteoarthritic patients. The change in 25(OH)D3 concentrations over time was significantly different between the 3 vitamin D groups (pvitD*time < 0.001). 25(OH)D3, 25-hydroxyvitamin D3.
