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PDF] Evidence that vitamin D 3 increases serum 25-hydroxyvitamin D more efficiently than does vitamin D 2 1 – 3 | Semantic Scholar
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The dynamic relationships between the active and catabolic vitamin D metabolites, their ratios, and associations with PTH | Scientific Reports
Using gas chromatography and mass spectrometry to determine 25-hydroxy" by M.-Y. Yang, C.-Y. Huang et al.
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PDF] Relation of obesity with serum 25 hydroxy vitamin D3 levels in type 2 diabetic patients | Semantic Scholar
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Associations of vitamin D binding protein variants with the vitamin D-induced increase in serum 25-hydroxyvitamin D - Clinical Nutrition ESPEN
A comparison of analytical methods for measuring concentrations of 25-hydroxy vitamin D in biological samples - Analytical Methods (RSC Publishing)
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