Fig. 1From: Determination of serum 25-hydroxyvitamin D status among population in southern China by a high accuracy LC-MS/MS method traced to reference measurement procedureTypical selected reaction monitoring chromatogram of 10 ng/mL 25(OH)D3, 10 ng/mL 3-epi-25(OH)D3 (a), 10 ng/mL 25(OH)D2 and 10 ng/mL 3-epi-25(OH)D2 (b) in serumBack to article page