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Alterations in (a) serum concentration of 24,25(OH)2D3, (b) serum concentration of 25(OH)D3, (c) ratio of 25(OH)D3/24,25(OH)2D3, and (d) serum concentration of cholecalciferol in single dose (open circle) and daily dose (black triangles) groups. The error bars represent standard deviations. P values are for comparison of values in daily and single dosing groups at corresponding time points.
