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. 2017 Aug 28;27(3):030501. doi: 10.11613/BM.2017.030501

Figure 2.

Figure 2

Relationship between the mean inter-laboratory imprecision (line and dotted plot) and the number of DEQAS (25-Hydroxyvitamin D measurements) registered laboratories (white bars). Gray bars indicates the numbers of returned results. With permission from DEQAS.