Fig. 3From: Changes in vitamin D and calcium metabolism markers in patients undergoing adjuvant chemotherapy for breast cancerPredicted (solid lines) and observed (dashed lines) vitamin D serum concentration during chemotherapy. Patients were divided in two groups: vitamin D sufficient (n = 16, black lines) and insufficient (n = 66, grey lines) using the baseline serum vitamin D level cut-off of 30 ng/mL (75 nmol/L)Back to article page