Fig. 5From: Implications of standardization of serum 25-hydroxyvitamin D data for the evaluation of vitamin D status in Germany, including a temporal analysisWeighted relative frequency for original and standardized serum 25(OH)D of DEGS1 samples. 25(OH)D, Serum 25-hydroxyvitamin D; DEGS1, German Health Interview and Examination Survey for AdultsBack to article page