Measurement of Circulating 25-Hydroxy Vitamin D Using Three Commercial Enzyme-Linked Immunosorbent Assay Kits with Comparison to Liquid Chromatography: Tandem Mass Spectrometry Method
Figure 1
Comparison of the LC-MS/MS method with ELISAs from Eagle Biosciences ((a), (b)), Immundiagnostik ((c), (d)), and MicroVue ((e), (f)) by the simple linear regression ((a), (c), and (e)) and Bland-Altman plots ((b), (d), and (f)).
